iot/projects/IoTCenter/Api/NodeController.cs

using Application.Domain.Entities;
using Infrastructure.Data;
using Infrastructure.Extensions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using System;
using System.Linq;

namespace UserCenter.Controllers
{
    [ApiVersion("1.0")]
    [Route("api/v{version:apiVersion}/[controller]/[action]")]
    [ApiController]
    public class NodeController : ControllerBase
    {
        private readonly IConfiguration _cfg;
        private readonly IRepository<Node> _nodeRepo;
        private readonly IRepository<NodeCategory> _nodeCategoryRepo;

        public NodeController(IConfiguration cfg,
            IRepository<Node> nodeRepo,
            IRepository<NodeCategory> nodeCategoryRepo)
        {
            this._cfg = cfg;
            this._nodeRepo = nodeRepo;
            this._nodeCategoryRepo = nodeCategoryRepo;
        }

        [HttpPost]
        public ActionResult GetNodes()
        {
            try
            {
                //var model = this._nodeCategoryRepo.ReadOnlyTable()
                //    .Include(o => o.CategoryNodes)
                //    .ThenInclude(o => o.Node)
                //    .OrderBy(o => o.DisplayOrder)
                //    .Select(o => new
                //    {
                //        o.Name,
                //        o.DisplayOrder,
                //        Nodes = o.CategoryNodes.Select(o => o.Node)
                //    });
                var model = this._nodeRepo.ReadOnlyTable()
                    .Select(o => new
                    {
                        o.Id,
                        o.Name,
                        o.Number,
                        o.Image,
                        o.DisplayOrder,
                        Count = o.Devices.Count()
                    });
                return Ok(model);
            }
            catch (Exception ex)
            {
                ex.PrintStack();
                return Problem(ex.Message);
            }
        }
    }
}