backend/ExamKing.Application/Services/QuestionService.cs

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

namespace ExamKing.Application.Services
{
    /// <summary>
    /// 题库服务
    /// </summary>
    public class QuestionService : IQuestionService, ITransient
    {
        private readonly IRepository<TbExamquestion> _repository;

        /// <summary>
        /// 依赖注入
        /// </summary>
        public QuestionService(IRepository<TbExamquestion> repository)
        {
            _repository = repository;
        }

        /// <summary>
        /// 根据考试查询是非题分页
        /// </summary>
        /// <param name="id"></param>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <returns></returns>
        public async Task<PagedList<ExamquestionDto>> FindJudgeByExamAndPage(int id, int pageIndex = 1,
            int pageSize = 10)
        {
            var pageResult = from j in _repository.Change<TbJudge>().AsQueryable()
                join q in _repository.AsQueryable() on j.Id equals q.QuestionId
                where q.QuestionType.Equals(QuestionTypeConst.Judge) && q.ExamId == id
                select new ExamquestionDto
                {
                    Id = q.Id,
                    QuestionType = q.QuestionType,
                    ExamId = q.ExamId,
                    QuestionId = q.QuestionId,
                    Score = q.Score,
                    Judge = new JudgeDto
                    {
                        Id = j.Id,
                        Question = j.Question,
                        Answer = j.Answer,
                        Ideas = j.Ideas,
                        CreateTime = j.CreateTime
                    }
                };