Description of the problem, including code/CLI snippet

According to Gitlab, we can make a batch GET call to fetch multiple issues by passing in the list of issue_ids in parameter iids.

However, while using the library this method call always returns a list with a single element (which happens to be the last element in the iids list.

project = gl.projects.get(project_id)
project.issues.list(all=True, iids=[1, 2, 3])   # Returns a list with a single element ProjectIssue[iid=3]
project.issues.list(all=True, iids=[3, 2, 1])   # Returns a list with a single element ProjectIssue[iid=1]

Are batch requests not supported yet or is this a bug?

Expected Behavior

The batch call should return a list of all ProjectIssues as mentioned in the iids field.

project = gl.projects.get(project_id)
project.issues.list(all=True, iids=[1, 2, 3])   # Should return [ProjectIssue(iid=1), ProjectIssue(iid=2), ProjectIssue(iid=3)]

Actual Behavior

Only the ProjectIssue corresponding to the last id in the iids list is returned

project = gl.projects.get(project_id)
project.issues.list(all=True, iids=[1, 2, 3])    # Returns a list with a single element ProjectIssue[iid=3]

Specifications

• python-gitlab version: 2.6.0
• API version you are using (v3/v4): v4
• Gitlab server version (or gitlab.com): GitLab Community Edition 13.10.2