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Templating: Makes so __searchFilter can be used as part of regular expression (#20103)

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* Fix: Fixes searchfilter wildcard char in regular expressions
Fixes: #20006

* Refactor: Uses TemplateSrv and ScopedVars instead

* Docs: Updates docs with new format

* Tests: Corrects test description
This commit is contained in:
Hugo Häggmark
2019-11-04 06:43:03 +01:00
committed by GitHub
parent fc5cc4cbf9
commit 7aeed4d987
12 changed files with 224 additions and 132 deletions
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docs/sources/features/datasources/postgres.md
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@@ -282,17 +282,19 @@ the hosts variable only show hosts from the current selected region with a query
SELECT hostname FROM host WHERE region IN($region)
```
#### Using `$__searchFilter` to filter results in Query Variable
#### Using `__searchFilter` to filter results in Query Variable
> Available from Grafana 6.5 and above
Using `$__searchFilter` in the query field will filter the query result based on what the user types in the dropdown select box.
When nothing has been entered by the user the default value for `$__searchFilter` is `%`.
Using `__searchFilter` in the query field will filter the query result based on what the user types in the dropdown select box.
When nothing has been entered by the user the default value for `__searchFilter` is `%`.
The example below shows how to use `$__searchFilter` as part of the query field to enable searching for `hostname` while the user types in the dropdown select box.
> Important that you surround the `__searchFilter` expression with quotes as Grafana does not do this for you.
The example below shows how to use `__searchFilter` as part of the query field to enable searching for `hostname` while the user types in the dropdown select box.
Query
```sql
SELECT hostname FROM my_host WHERE hostname LIKE $__searchFilter
SELECT hostname FROM my_host WHERE hostname LIKE '$__searchFilter'
```
### Using Variables in Queries