backend/ExamKing.Application/Services/ClassesService.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using Furion.DatabaseAccessor;
using Mapster;
using ExamKing.Core.Entites;
using ExamKing.Application.Mappers;
using System.Threading.Tasks;
using ExamKing.Application.ErrorCodes;
using Furion.DatabaseAccessor.Extensions;
using Furion.DependencyInjection;
using Furion.FriendlyException;
using Microsoft.EntityFrameworkCore;

namespace ExamKing.Application.Services
{
    /// <summary>
    /// 班级服务
    /// </summary>
    public class ClassesService : IClassesService, ITransient
    {
        private readonly IRepository<TbClass> _classRepository;
        /// <summary>
        /// 构造方法
        /// </summary>
        /// <param name="classRepository"></param>
        public ClassesService(IRepository<TbClass> classRepository)
        {
            _classRepository = classRepository;
        }

        /// <summary>
        /// 分页查询班级
        /// </summary>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <returns></returns>
        public async Task<PagedList<ClassesDto>> FindClassesAllByPage(int pageIndex = 1, int pageSize = 10)
        {
            var pageResult = await _classRepository
                .Entities.AsNoTracking()
                .Select(u => new TbClass
                {
                    Id=u.Id,
                    ClassesName=u.ClassesName,
                    CreateTime=u.CreateTime,
                    DeptId = u.DeptId,
                    Dept = new TbDept
                    {
                        CreateTime=u.Dept.CreateTime,
                        DeptName=u.Dept.DeptName
                    }
                })
                .ToPagedListAsync(pageIndex, pageSize);

            return  pageResult.Adapt<PagedList<ClassesDto>>();
        }

        /// <summary>
        /// 新增班级