# Variable interpolation doesn't work for POST method

**URL:** <https://community.grafana.com/t/variable-interpolation-doesnt-work-for-post-method/65225>\
**Category:** Grafana Loki\
**Created:** [May 5, 2022, 10:06am UTC](https://community.grafana.com/t/variable-interpolation-doesnt-work-for-post-method/65225 "2022-05-05T10:06:05Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![krotorbobr](https://avatars.discourse-cdn.com/v4/letter/k/a4c791/32.png) [@krotorbobr](https://community.grafana.com/u/krotorbobr)\
**Post date:** [May 5, 2022, 10:06am UTC](https://community.grafana.com/t/variable-interpolation-doesnt-work-for-post-method/65225/1 "2022-05-05T10:06:05Z")

</div>

I tried to use variables or ad-hoc filters in Grafana Loki panels.  
When I use panel single query in a panel, Grafana uses method GET to send data. In that case variable/filter interpolation works as expected.

Example:

- Grafana query:

```auto
  {app="app",log_type="log"} 
  | logfmt
  | appsession_id = "$appsession_id"
  | line_format "{{.message}}"

```

- GET query from network tab in browser:  
 ![image](https://us1.discourse-cdn.com/grafana/original/3X/2/c/2cd2b0f582987363eee40ba7add13e72234cef09.png)

When I use panel with multiple query in a panel, Grafana uses method POST to send data. In that case variable/filter interpolation doesn’t work:  
Example:

- Grafana query, one of several from panel:

```auto
sum by (channel) (
  count_over_time(
    {app="app",log_type="log",project="$project"} 
    | logfmt
    | message="App" [$__interval]
  )
)

```

- POST query from network tab in browser:  
 ![image](https://us1.discourse-cdn.com/grafana/original/3X/4/e/4e3f6aeaddb1120cd55fd27d0f2f4f48ec8d92c4.png)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/grafana/original/2X/e/ef5308cc58c9e5a13187b5012eb99f406928462f.png) [@system](https://community.grafana.com/u/system)\
**Post date:** [May 5, 2023, 10:06am UTC](https://community.grafana.com/t/variable-interpolation-doesnt-work-for-post-method/65225/2 "2023-05-05T10:06:37Z")

</div>

This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.