choose_merge_request() fails with "Could not parse JSON request body" when called without arguments

[Cliffback]

Description:

Prerequisites

• I'm on the latest version of the plugin
• I've installed the required dependencies
• I've run :h gitlab.nvim.troubleshooting and followed the steps there

Setup Configuration and Environment

require("gitlab").setup()

Using .gitlab.nvim file with auth_token and gitlab_url for a self-hosted GitLab instance.

Bug Description

Calling choose_merge_request() without arguments (e.g. via the default glc keybinding) fails with:

Could not parse JSON request body: json: cannot unmarshal array into Go value of type gitlab.ListProjectMergeRequestsOptions

The cause is in lua/gitlab/state.lua line 565 - the merge_requests dependency's body function returns opts or {}. In Lua, an empty table {} with no string keys is encoded by vim.json.encode as a JSON array [], but the Go server expects a JSON object {}.

Calling with an explicit option works: :lua require("gitlab").choose_merge_request({ state = "opened" }).

Fix: Change return opts or {} to return opts or vim.empty_dict() in lua/gitlab/state.lua line 565. vim.empty_dict() ensures the value is encoded as a JSON object.

Reproduction Steps

1. Open Neovim in a GitLab project directory with a valid .gitlab.nvim config
2. Press glc or run :lua require("gitlab").choose_merge_request()
3. Observe error: "Could not parse JSON request body"

Screenshots

Server log showing the issue:

-- REQUEST TO GO SERVER --
POST /merge_requests HTTP/1.1
...
[]
-- RESPONSE FROM GO SERVER --
HTTP/0.0 400 Bad Request
...
{"message":"Could not parse JSON request body","details":"json: cannot unmarshal array into Go value of type gitlab.ListProjectMergeRequestsOptions"}

[jakubbortlik]

Closed by #554.