# Bug in dashboard chart "Group by" with identical values

**URL:** <https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558>\
**Category:** Configuration\
**Created:** [June 4, 2025, 9:51pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558 "2025-06-04T21:51:27Z")\
**Posts on this page:** 20\
**Page:** 1

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 4, 2025, 9:51pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/1 "2025-06-04T21:51:27Z")

</div>

Good evening,

I’m submitting what I think is a bug 😅

In fact, when I create a chart of this type with this device in particular:

 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/f/4/f4fced11ce462af2cdc45301186c319a8da66dec.png)  
 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/b/3/b3741bf2eb645e96f322c0d4c7e1b64dc081558f.png)

And when I save the page, the data is saved correctly but I then end up on a page like this which stays stuck:

 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/3/7/3756097c4a0865b5fc6c5bc9a0ebf4784e931a52.png)

I can press back in the browser and return to the edit window, and when I select «&nbsp;Do not group&nbsp;»:

![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/b/6/b69669f44ed23f94190643e7ec15d29a7fd2d6ca.png)

And when I save the page, the data is saved correctly and I get to my page properly loaded:

 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/1/1/115aeaa4b0f2391cb66ded4f70235ea0e885ff08.png)

The other charts are configured the same with grouping by hour and those work fine.

The only difference is that the value hasn’t changed for a while on this sensor (I will investigate because that’s not normal), but I think the problem comes from here 🤔

Thanks 🙂

Edit: I was able to fix my value sending problem by reintegrating the module.  
A new value was sent and I was able to restore grouping by hour and it’s OK

 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/6/9/69b775a3610b1b0a771c48cb0c98634185cab12a.png)

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 5, 2025, 6:52am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/2 "2025-06-05T06:52:37Z")

</div>

Thanks for the reply! If you can reproduce it, do you see the error in the browser console? (Right-click → Inspect → Console)

Otherwise, I’ll try to reproduce it 🙂

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 5, 2025, 12:39pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/3 "2025-06-05T12:39:55Z")

</div>

I couldn’t reproduce the bug under the same conditions, but I got this:

 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/d/7/d735578b52731c79c0595307ce839f4558952c63.png)

```auto
{
    "response": {
        "status": 500,
        "data": {
            "status": 500,
            "code": "SERVER_ERROR",
            "error": {}
        }
    }
}

```

```auto
index.js:652 Gladys Gateway, connected in websocket
main.js:56 {response: {…}}response: data: code: "SERVER_ERROR"error: {}status: 500[[Prototype]]: Objectconstructor: ƒ Object()hasOwnProperty: ƒ hasOwnProperty()isPrototypeOf: ƒ isPrototypeOf()propertyIsEnumerable: ƒ propertyIsEnumerable()toLocaleString: ƒ toLocaleString()toString: ƒ toString()valueOf: ƒ valueOf() __defineGetter__ : ƒ __defineGetter__ () __defineSetter__ : ƒ __defineSetter__ () __lookupGetter__ : ƒ __lookupGetter__ () __lookupSetter__ : ƒ __lookupSetter__ () __proto__ : (...)get __proto__ : ƒ __proto__ ()set __proto__ : ƒ __proto__ ()status: 500[[Prototype]]: Objectconstructor: ƒ Object()hasOwnProperty: ƒ hasOwnProperty()isPrototypeOf: ƒ isPrototypeOf()propertyIsEnumerable: ƒ propertyIsEnumerable()toLocaleString: ƒ toLocaleString()toString: ƒ toString()valueOf: ƒ valueOf() __defineGetter__ : ƒ __defineGetter__ () __defineSetter__ : ƒ __defineSetter__ () __lookupGetter__ : ƒ __lookupGetter__ () __lookupSetter__ : ƒ __lookupSetter__ () __proto__ : (...)get __proto__ : ƒ __proto__ ()set __proto__ : ƒ __proto__ ()[[Prototype]]: Objectconstructor: ƒ Object()hasOwnProperty: ƒ hasOwnProperty()isPrototypeOf: ƒ isPrototypeOf()propertyIsEnumerable: ƒ propertyIsEnumerable()toLocaleString: ƒ toLocaleString()toString: ƒ toString()valueOf: ƒ valueOf() __defineGetter__ : ƒ __defineGetter__ () __defineSetter__ : ƒ __defineSetter__ () __lookupGetter__ : ƒ __lookupGetter__ () __lookupSetter__ : ƒ __lookupSetter__ () __proto__ : (...)get __proto__ : ƒ __proto__ ()set __proto__ : ƒ __proto__ ()
refreshTabletMode @ main.js:56
await in refreshTabletMode
checkSession @ main.js:71
await in checkSession
(anonymous) @ index.js:60
componentWillMount @ app.jsx:383
E @ index.js:150
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
k @ render.js:42
t @ entry.js:60
Pq/i @ entry.js:66
i @ bootstrap:68
(anonymous) @ bootstrap:252
(anonymous) @ bundle.995e6.esm.js:1
SetTabletMode.jsx:34 {response: {…}}
(anonymous) @ SetTabletMode.jsx:34
await in (anonymous)
(anonymous) @ SetTabletMode.jsx:63
await in (anonymous)
componentDidMount @ SetTabletMode.jsx:81
(anonymous) @ index.js:358
(anonymous) @ index.js:356
x @ index.js:351
p @ component.js:149
Promise.then
h @ component.js:210
c.setState @ component.js:54
(anonymous) @ async.js:36
(anonymous) @ index.js:7
Promise.then
(anonymous) @ index.js:5
i.componentWillMount @ async.js:34
E @ index.js:150
f @ children.js:96
E @ index.js:262
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
E @ index.js:262
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
k @ render.js:42
t @ entry.js:60
Pq/i @ entry.js:66
i @ bootstrap:68
(anonymous) @ bootstrap:252
(anonymous) @ bundle.995e6.esm.js:1
apexcharts.common.js:6 Uncaught (in promise) RangeError: Invalid array length
    at Array.push (<anonymous>)
    at e.value (apexcharts.common.js:6:166933)
    at e.value (apexcharts.common.js:6:168998)
    at e.value (apexcharts.common.js:6:175666)
    at e.value (apexcharts.common.js:6:171632)
    at e.value (apexcharts.common.js:6:427093)
    at e.value (apexcharts.common.js:14:38538)
    at e.create (apexcharts.common.js:6:5550)
    at apexcharts.common.js:14:37073
    at new Promise (<anonymous>)
    at e.value (apexcharts.common.js:14:21768)
    at t.c.displayChart (ApexChartComponent.jsx:218:18)
    at t.c.componentDidMount (ApexChartComponent.jsx:222:10)
    at index.js:358:8
    at Array.some (<anonymous>)
    at index.js:356:16
value @ apexcharts.common.js:6
value @ apexcharts.common.js:6
value @ apexcharts.common.js:6
value @ apexcharts.common.js:6
value @ apexcharts.common.js:6
value @ apexcharts.common.js:14
(anonymous) @ apexcharts.common.js:6
(anonymous) @ apexcharts.common.js:14
value @ apexcharts.common.js:14
(anonymous) @ ApexChartComponent.jsx:218
componentDidMount @ ApexChartComponent.jsx:222
(anonymous) @ index.js:358
(anonymous) @ index.js:356
x @ index.js:351
p @ component.js:149
Promise.then
h @ component.js:210
c.setState @ component.js:54
(anonymous) @ Chart.jsx:326
await in (anonymous)
componentDidMount @ Chart.jsx:357
(anonymous) @ index.js:358
(anonymous) @ index.js:356
x @ index.js:351
p @ component.js:149
Promise.then
h @ component.js:210
c.setState @ component.js:54
(anonymous) @ index.js:98
await in (anonymous)
(anonymous) @ index.js:123
await in (anonymous)
componentDidMount @ index.js:224
(anonymous) @ index.js:358
(anonymous) @ index.js:356
x @ index.js:351
p @ component.js:149
Promise.then
h @ component.js:210
c.setState @ component.js:54
(anonymous) @ async.js:36
(anonymous) @ index.js:7
Promise.then
(anonymous) @ index.js:5
i.componentWillMount @ async.js:34
E @ index.js:150
f @ children.js:96
E @ index.js:262
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
E @ index.js:262
f @ children.js:96
_ @ index.js:527
E @ index.js:321
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
f @ children.js:96
E @ index.js:262
k @ render.js:42
t @ entry.js:60
Pq/i @ entry.js:66
i @ bootstrap:68
(anonymous) @ bootstrap:252
(anonymous) @ bundle.995e6.esm.js:1

```

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 6:20am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/4 "2025-06-06T06:20:38Z")

</div>

Ok thanks that should be enough for me to reproduce!

I created a GitHub issue with the details:

> <https://github.com/GladysAssistant/Gladys/issues/2328>
>
> https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec…-valeur-identique/9558

I’ll keep you posted

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 6:59am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/5 "2025-06-06T06:59:29Z")

</div>

@prohand I couldn’t reproduce it 😃 I tried exactly the same case as you, and everything works. Can you give me more details on how to reproduce it?

In the meantime, I improved the error handling of this widget to display exactly the error coming from the server instead of just continuing to spin indefinitely 🙂

An example with a dummy error for testing:

 ![Screenshot 2025-06-06 at 08.58.14](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/0/7/07312c90522e7a3178092ca7ef1dd52626281f92.png)

Edit: The PR:

> <https://github.com/GladysAssistant/Gladys/pull/2329>
>
> \### Pull Request check-list
> 
> To ensure your Pull Request can be accepted as fa…st as possible, make sure to review and check all of these items:
> 
> \- \[x\] If your changes affects code, did your write the tests?
> \- \[x\] Are tests passing? (\`npm test\` on both front/server)
> \- \[x\] Is the linter passing? (\`npm run eslint\` on both front/server)
> \- \[x\] Did you run prettier? (\`npm run prettier\` on both front/server)
> \- \[x\] If you are adding a new features/services, did you run integration comparator? (\`npm run compare-translations\` on front)
> \- \[x\] Did you test this pull request in real life? With real devices? If this development is a big feature or a new service, we recommend that you provide a Docker image to the community (\[french forum\](https://community.gladysassistant.com/)/\[english forum\](https://en-community.gladysassistant.com/)) for testing before merging.
> 
> \### Description of change
> 
> Display HTTP error in UI to make debugging easier
> 
> !\[Screenshot 2025-06-06 at 08 58 14\](https://github.com/user-attachments/assets/63318fb9-49d0-475d-a95a-1d9eb9750113)

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 8:31am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/6 "2025-06-06T08:31:46Z")

</div>

Thanks for the PR 🙂

Right now I can’t reproduce the problem ^^

Did you try having a single value in the graph, I suppose, and grouping it by hour?

Otherwise I’ll see when the PR is in Prod if it shows me an error message 😇

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 8:45am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/7 "2025-06-06T08:45:10Z")

</div>

> [@prohand](#):
>
> Did you try having a single value in the graph, I suppose, and grouping it by hour?

Yes! I tried several cases: no values and with a single value.

[quote="prohand, post:6, topic:9558

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 8:49am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/8 "2025-06-06T08:49:10Z")

</div>

I managed to reproduce it with this chart using only a temperature value 🙂

No errors in the Gladys logs

The console doesn’t show me any more errors than before because when saving the screen freezes and I have to press F5 to return to the editor window.

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 8:50am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/9 "2025-06-06T08:50:55Z")

</div>

> [@prohand](#):
>
> I managed to reproduce it with this chart using only a temperature value 🙂

Can you describe the steps to follow to reproduce it?

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 9:04am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/10 "2025-06-06T09:04:44Z")

</div>

The issue does not seem to occur on all devices.

I was able to reproduce the problem as follows:

Here I selected a temperature sensor on a probe that detects if there is a water leak (Water Leak Sensor (Temperature))

Adding a chart.  
Select a device with a temperature that has only one value  
Select chart type: Area  
Show axes: Yes  
Aggregation function: Average  
Group by: Hour (Also tested with Do not group)  
Show variation: Yes  
Default interval: 24h

And Save

I was able to see this in the console:

````auto
{
    "response": {
        "status": 422,
        "data": {
            "status": 422,
            "code": "UNPROCESSABLE_ENTITY",
            "properties": [
                {
                    "message": "\"[2][4].chart_type\" is not allowed to be empty",
                    "attribute": "boxes",
                    "value": [
                        [
                            {
                                "type": "temperature-in-room",
                                "room": "bedroom-2",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "children's room",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "bathroom",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "office",
                                "temperature_use_custom_value": true,
                                "temperature_min": 17,
                                "temperature_max": 30
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "kitchen",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "living room",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "entrance",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "temperature-in-room",
                                "room": "toilet",
                                "temperature_use_custom_value": true
                            },
                            {
                                "type": "chart",
                                "device_features": [
                                    "zigbee2mqtt-bathroom-temperature-sensor-decimal-temperature"
                                ],
                                "units": [
                                    "celsius"
                                ],
                                "chart_type": "area",
                                "display_variation": true,
                                "interval": "last-day",
                                "display_axes": true,
                                "title": "Bathroom Temperature",
                                "device_feature_names": [
                                    "Bathroom Temperature Sensor (Temperature)"
                                ],
                                "group_by": "hour"
                            },
                            {
                                "type": "chart",
                                "device_feature_names": [
                                    "Kitchen Temperature Sensor (Temperature)"
                                ],
                                "device_features": [
                                    "zigbee2mqtt-kitchen-temperature-sensor-decimal-temperature"
                                ],
                                "title": "Kitchen Temperature",
                                "chart_type": "area",
                                "units": [
                                    "celsius"
                                ],
                                "aggregate_function": "avg",
                                "display_axes": true,
                                "display_variation": true,
                                "interval": "last-day",
                                "group_by": "hour"
                            }
                        ],
                        [
                            {
                                "type": "humidity-in-room",
                                "room": "bedroom-2",
                                "humidity_use_custom_value": true
                            },
                            {
                                "type": "humidity-in-room",
                                "room": "children's room",
                                "humidity_use_custom_value": true
                            },
                            {
                                "type": "humidity-in-room",
                                "room": "bathroom",
                                "humidity_use_custom_value": true
                            },
                            {
                                "type": "humidity-in-room",
                                "room": "office",
                                "humidity_use_custom_value": true
                            },
                            {
                                "type": "humidity-in-room",
                                "room": "kitchen",
                                "humidity_use_custom_value": true
                            },
                            {
                                "type": "humidity-in-room",
                                "room": "living room",
                                "humidity_use_custom_value": true,
                                "humidity_min": 45,
                                "humidity_max": 60
                            },
                            {
                                "type": "humidity-in-room",
                                "room": "entrance",
                                "humidity_use_custom_value": true
                            },
                            {
                                "type": "humidity-in-room",
                                "humidity_use_custom_value": true,
                                "room": "toilet"
                            },
                            {
                                "type": "chart",
                                "device_features": [
                                    "zigbee2mqtt-bathroom-humidity-sensor-decimal-humidity"
                                ],
                                "units": [
                                    "percent"
                                ],
                                "chart_type": "area",
                                "display_axes": true,
                                "display_variation": true,
                                "interval": "last-day",
                                "title": "Bathroom Humidity",
                                "colors": [
                                    "#d63031"
                                ],
                                "device_feature_names": [
                                    "Bathroom Temperature Sensor (Humidity (percentage))"
                                ],
                                "group_by": "hour"
                            },
                            {
                                "type": "chart",
                                "device_feature_names": [
                                    "Kitchen Temperature Sensor (Humidity (percentage))"
                                ],
                                "device_features": [
                                    "zigbee2mqtt-kitchen-humidity-sensor-decimal-humidity"
                                ],
                                "title": "Kitchen Humidity"```,
                                "units": [
                                    "percent"
                                ],
                                "aggregate_function": "avg",
                                "chart_type": "area",
                                "colors": [
                                    "#d63031"
                                ],
                                "display_axes": true,
                                "display_variation": true,
                                "interval": "last-day",
                                "group_by": "hour"
                            }
                        ],
                        [
                            {
                                "type": "chart",
                                "device_features": [
                                    "zigbee2mqtt-capteur-temperature-chambre-1-temperature-sensor-decimal-temperature",
                                    "zigbee2mqtt-capteur-temperature-chambre-2-temperature-sensor-decimal-temperature"
                                ],
                                "units": [
                                    "celsius",
                                    "celsius"
                                ],
                                "chart_type": "area",
                                "display_axes": true,
                                "display_variation": true,
                                "interval": "last-day",
                                "title": "Bedroom Temperatures",
                                "device_feature_names": [
                                    "Bedroom 1 Temperature Sensor (Temperature)",
                                    "Bedroom 2 Temperature Sensor (Temperature)"
                                ],
                                "aggregate_function": "avg",
                                "group_by": "hour"
                            },
                            {
                                "type": "chart",
                                "device_features": [
                                    "zigbee2mqtt-capteur-temperature-chambre-1-humidity-sensor-decimal-humidity",
                                    "zigbee2mqtt-capteur-temperature-chambre-2-humidity-sensor-decimal-humidity"
                                ],
                                "units": [
                                    "percent",
                                    "percent"
                                ],
                                "title": "Bedroom Humidity",
                                "chart_type": "area",
                                "display_axes": true,
                                "display_variation": true,
                                "interval": "last-day",
                                "device_feature_names": [
                                    "Bedroom 1 Temperature Sensor (Humidity (Percentage))",
                                    "Bedroom 2 Temperature Sensor (Humidity (Percentage))"
                                ],
                                "group_by": "hour"
                            },
                            {
                                "type": "chart",
                                "device_features": [
                                    "zigbee2mqtt-capteur-temperature-salon-temperature-sensor-decimal-temperature"
                                ],
                                "units": [
                                    "celsius"
                                ],
                                "title": "Living Room Temperature",
                                "chart_type": "area",
                                "display_axes": true,
                                "display_variation": true,
                                "interval": "last-day",
                                "device_feature_names": [
                                    "Living Room Temperature Sensor (Temperature)"
                                ],
                                "aggregate_function": "avg",
                                "group_by": "hour"
                            },
                            {
                                "type": "chart",
                                "device_features": [
                                    "zigbee2mqtt-capteur-temperature-salon-humidity-sensor-decimal-humidity"
                                ],
                                "units": [
                                    "percent"
                                ],
                                "title": "Living Room Humidity",
                                "chart_type": "area",
                                "display_axes": true,
                                "interval": "last-day",
                                "display_variation": true,
                                "colors": [
                                    "#d63031"
                                ],
                                "device_feature_names": [
                                    "Living Room Temperature Sensor (Humidity (Percentage))"
                                ],
                                "aggregate_function": "avg",
                                "group_by": "hour"
                            },
                            {
                                "type": "chart",
                                "device_feature_names": [
                                    "Washing Machine Water Sensor (Temperature)"
                                ],
                                "device_features": [
                                    "zigbee2mqtt-capteur-eau-lave-linge-device-temperature-sensor-decimal-device-temperature"
                                ],
                                "units": [
                                    "celsius"
                                ],
                                "aggregate_function": "avg",
                                "chart_type": "",
                                "display_axes": true,
                                "group_by": "hour",
                                "interval": "last-day",
                                "display_variation": true
                            }
                        ]
                    ],
                    "type": "Validation error"
                }
            ]
        }
    }
}
````

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 9:06am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/11 "2025-06-06T09:06:48Z")

</div>

> [@prohand](#):
>
> I could see this in the console :

In my opinion it’s something else, you just haven’t selected a chart type, apparently? `[2][4].chart_type\\\" is not allowed to be empty`

That doesn’t look like the error you had before

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 9:09am UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/12 "2025-06-06T09:09:08Z")

</div>

Indeed, sorry ☹

I can’t reproduce the issue again at the moment

However, whenever I save I get quite a few errors like this, even though it doesn’t reproduce the bug:

```auto
{
    "status": 500,
    "data": {
        "status": 500,
        "code": "SERVER_ERROR",
        "error": {}
    }
}

```

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 12:21pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/13 "2025-06-06T12:21:55Z")

</div>

> [@prohand](#):
>
> However, each time I save I get quite a few errors like this one, although it doesn’t reproduce the bug:

Do you have, in the «&nbsp;Network&nbsp;» tab, the request that shows this error?

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 12:32pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/14 "2025-06-06T12:32:16Z")

</div>

In the Network tab I don’t have a 500 status code:

 ![image](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/a/c/aca2cf55a1eaf0c1e474148fee9558442a746738.png)

But I do have the message in the console

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 12:38pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/15 "2025-06-06T12:38:14Z")

</div>

> [@prohand](#):
>
> In the Network tab I don’t see a 500 status code:

You’re on Gladys Plus, that’s normal — can you run the same test locally? 🙂

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 12:47pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/16 "2025-06-06T12:47:30Z")

</div>

I can’t reproduce the problem locally  
I really feel like it’s related to Gladys Plus

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 2:30pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/17 "2025-06-06T14:30:32Z")

</div>

We’re making progress 🙂

I tried on my end to reproduce it on Gladys Plus, without success.

I created a temperature sensor, added it to the dashboard in a chart with all the same settings, and it works well:

 ![Screenshot 2025-06-06 at 16.28.58](https://gladys-assistant-community.b-cdn.net/uploads/default/original/3X/0/2/02fe884f824686351ae012269a31bd0d672405f9.png)

Are you sure you don’t have any logs in Gladys? If there’s a 500 error, there’s usually an error log

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 2:36pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/18 "2025-06-06T14:36:05Z")

</div>

I’ve tried several times to reproduce the original problem but I haven’t been able to ☹  
It seems the problem is intermittent and I can’t find a common denominator…

As for the 500 error, yes I’m sure I don’t have any error logs in docker logs glagys 😉

---

<div class="post-metadata">

**Author:** ![pierre-gilles](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/pierre-gilles/32/5886_2.png) [@pierre-gilles](https://community.gladysassistant.com/u/pierre-gilles)\
**Post date:** [June 6, 2025, 2:42pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/19 "2025-06-06T14:42:46Z")

</div>

> [@prohand](#):
>
> For the 500 error yes I’m sure I don’t have any error logs in docker logs glagys 😉

I went to check, and indeed the «&nbsp;log level&nbsp;» of a 500 error is not high enough for it to be visible in production logs, I changed that in a PR because it should be more easily visible:

> <https://github.com/GladysAssistant/Gladys/pull/2331>
>
> \### Pull Request check-list
> 
> To ensure your Pull Request can be accepted as fa…st as possible, make sure to review and check all of these items:
> 
> \- \[x\] If your changes affects code, did your write the tests?
> \- \[x\] Are tests passing? (\`npm test\` on both front/server)
> \- \[x\] Is the linter passing? (\`npm run eslint\` on both front/server)
> \- \[x\] Did you run prettier? (\`npm run prettier\` on both front/server)
> \- \[x\] If you are adding a new features/services, did you run integration comparator? (\`npm run compare-translations\` on front)
> \- \[x\] Did you test this pull request in real life? With real devices? If this development is a big feature or a new service, we recommend that you provide a Docker image to the community (\[french forum\](https://community.gladysassistant.com/)/\[english forum\](https://en-community.gladysassistant.com/)) for testing before merging.
> 
> \### Description of change
> 
> Increase error 500 log level to warn in logs

> [@prohand](#):
>
> I have the impression that the problem is random and I can’t find a common denominator…

Don’t worry with the 2 changes I’ve made:

- Error message displayed in the interface
- Full 500 error displayed in the logs

You should be able to debug that better after the next release 😉

---

<div class="post-metadata">

**Author:** ![prohand](https://gladys-assistant-community.b-cdn.net/user_avatar/community.gladysassistant.com/prohand/32/15713_2.png) [@prohand](https://community.gladysassistant.com/u/prohand)\
**Post date:** [June 6, 2025, 2:51pm UTC](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558/20 "2025-06-06T14:51:02Z")

</div>

Perfect 🙂

Thank you very much, I’ll get back to you after the next release

[Next page](https://community.gladysassistant.com/t/bug-dashboard-graphique-grouper-par-avec-valeur-identique/9558.md?page=2)