68 lines
2.0 KiB
C#
68 lines
2.0 KiB
C#
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using data.DAO;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using Microsoft.EntityFrameworkCore;
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namespace data.Repository
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{
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public class SQLGroupRepository : IGroupRepository
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{
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private readonly DatabaseContext _dbContext;
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public SQLGroupRepository(DatabaseContext dbContext)
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{
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_dbContext = dbContext;
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}
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public bool AddGroupWithStudents(Group group, IEnumerable<Student> students)
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{
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using var transaction = _dbContext.Database.BeginTransaction();
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try
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{
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_dbContext.Groups.Add(group);
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_dbContext.SaveChanges();
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foreach (var item in students)
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{
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item.Group = group;
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_dbContext.Students.Add(item);
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}
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_dbContext.SaveChanges();
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transaction.Commit();
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return true;
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}
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catch (Exception ex)
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{
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Debug.WriteLine("Во время добавления группы со студентами произошла ошибка: ", ex.Message);
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transaction.Rollback();
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}
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return false;
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}
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public bool CreateGroup(Group group)
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{
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_dbContext.Groups.Add(group);
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return _dbContext.SaveChanges() > 0;
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}
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public bool DeleteGroup(int id)
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{
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Group group = _dbContext.Groups.Single(g => g.Id == id);
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_dbContext.Groups.Remove(group);
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return _dbContext.SaveChanges() > 0;
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}
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public IEnumerable<Group> GetAllGroups()
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=> _dbContext.Groups.Include(g => g.Students).ToList();
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public bool UpdateGroup(int id, string name)
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{
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Group group = _dbContext.Groups.Single(g => g.Id == id);
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group.Name = name;
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return _dbContext.SaveChanges() > 0;
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}
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}
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}
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