Gitlab API for environments name/search filtering not working
### Summary
The gitlab REST API for querying environments by name or search does not work.
### Steps to reproduce
See https://forum.gitlab.com/t/gitlab-api-for-environments-name-search-filtering-not-working/31983
consider a desire to find an environment ID by name
```
PRIVATE_TOKEN="..."
PROJECT_URI="https://..."
PROJECT_ID="XX"
```
As per this the documentation describes precisely what I want.
https://docs.gitlab.com/ee/api/environments.html#list-environments
`?name=` & `?search=`
experimenting with the basic query, I can see my environments in the BULK get
```
curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" ${PROJECT_URI}/api/v4/projects/${PROJECT_ID}/environments?per_page=100 | jq '.[] | .name' | grep master/
(snip)
"master/3524"
"master/3525"
"master/3526"
```
:heavy_check_mark:
but my goal is to get the ID of a specific environment, by a specific name, so lets say I want “master/3524”
```
$ curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" ${PROJECT_URI}/api/v4/projects/${PROJECT_ID}/environments?name=master%2F3524 | jq '.[] | .name'
(SNIP)
...
lists ALL environments!!
...
```
:exclamation:
it doesn’t match, in the documentation example, it is quite clear that / needs to be %2F (verified https://en.wikipedia.org/wiki/Percent-encoding) , i tried / directly, … but of course this doesn’t work because / is a reserved character, it needs to be % encoded
tried the search filter as well, same problem
```
curl --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" ${PROJECT_URI}/api/v4/projects/${PROJECT_ID}/environments?search=3524 | jq '.[] | .name'
...
lists ALL environments!!
...
```
:exclamation:
(tried various other attempts/combinations, see the forum post)
### Example Project
(did not do)
### What is the current *bug* behavior?
The API query to "List environments" works without any parameters (lists all environments).
However the query to specify an environment by `name` or by `search` does not work.
### What is the expected *correct* behavior?
```
curl --header "PRIVATE-TOKEN: <your_access_token>" https://gitlab.example.com/api/v4/projects/1/environments?name=review%2Ffix-foo
```
, per the documentation: https://docs.gitlab.com/ee/api/environments.html#list-environments
Should work.
### Relevant logs and/or screenshots
N/A
### Output of checks
see above
#### Results of GitLab environment info
gitlab instance version `11.11.2`
#### Results of GitLab application Check
(skipped)
### Possible fixes
WORKAROUND I found was to list ALL environments, and filter using `jq`.
https://forum.gitlab.com/t/gitlab-api-for-environments-name-search-filtering-not-working/31983/2
```
curl --silent --header "PRIVATE-TOKEN: ${PRIVATE_TOKEN}" ${PROJECT_URI}/api/v4/projects/${PROJECT_ID}/environments?per_page=100 | jq '.[] | select(.name == "master/3526")' | jq '.id'
904
```
issue