新增：项目开发者接口

app/controllers/api/v1/projects/developers_controller.rb

@@ -0,0 +1,11 @@
+class Api::V1::Projects::DevelopersController < Api::V1::BaseController
+  def index
+    @query_result = ActiveRecord::Base.connection.select_all("select user_id, count(*), count(DISTINCT project_id), (select count(1) from issues where issues.author_id = commit_logs.user_id) as issues_count from commit_logs group by user_id")
+    @rows = kaminari_array_paginate(@query_result.rows)
+  end
+
+  def count
+    @query_result = ActiveRecord::Base.connection.select_all("select user_id, count(*), count(DISTINCT project_id), (select count(1) from issues where issues.author_id = commit_logs.user_id) as issues_count from commit_logs group by user_id")
+    render_ok({count: @query_result.rows.count})
+  end
+end

app/views/api/v1/projects/developers/index.json.jbuilder

@@ -0,0 +1,14 @@
+json.total_count @rows.total_count
+json.users @rows.each do |row|
+  user = User.find(row[0])
+  if user.blank?
+    json.user nil
+  else
+    json.user do 
+      json.partial! "api/v1/users/simple_user", user: user
+    end
+  end
+  json.commit_count row[1]
+  json.project_count row[2]
+  json.issues_count row[3]
+end