新增：根据项目id查询数据集接口

app/controllers/api/v1/project_datasets_controller.rb

@@ -0,0 +1,10 @@
+class Api::V1::ProjectDatasetsController < Api::V1::BaseController 
+
+  def index 
+    return render_error("请输入正确的项目id字符串") unless params[:ids].present? 
+    ids = params[:ids].split(",")
+    @project_datasets = ProjectDataset.where(project_id: ids).includes(:license, :project)
+    @project_datasets = kaminari_unlimit_paginate(@project_datasets)
+  end
+
+end