.NetCore中EFCore的使用整理（三）-关联表操作

            StudyAboard_TestContext _context = new StudyAboard_TestContext();
            CrmRole role = _context.CrmRole
                .Include(q => q.CrmRoleMenu)
                .Where(q => q.Id == 1).FirstOrDefault();

            StudyAboard_TestContext _context = new StudyAboard_TestContext();
            CrmRole role = _context.CrmRole
                .Include(q => q.CrmRoleMenu)
                .Where(q => q.Id == 1).FirstOrDefault();

            //清空关联表数据
            _context.CrmRoleMenu.RemoveRange(role.CrmRoleMenu);
            _context.SaveChanges();

            CrmRole role = new CrmRole()
            {
                Name = "测试角色"
            };

            role.CrmRoleMenu.Add(new CrmRoleMenu()
            {
                MenuId = 1
            });
            role.CrmRoleMenu.Add(new CrmRoleMenu()
            {
                MenuId = 2
            });
            _context.CrmRole.Add(role);
            _context.SaveChanges();

            StudyAboard_TestContext _context = new StudyAboard_TestContext();
            CrmRole role = _context.CrmRole
                .Include(q => q.CrmRoleMenu)
                .Where(q => q.Id == 1).FirstOrDefault();

            //添加关联表数据
            role.CrmRoleMenu.Add(new CrmRoleMenu()
            {
                MenuId = 1
            });
            role.CrmRoleMenu.Add(new CrmRoleMenu()
            {
                MenuId = 2
            });
            _context.SaveChanges();