/// <summary>
/// 添加外键。
/// </summary>
/// <typeparam name="TPrincipal">主键类。</typeparam>
/// <param name="columns">字段。</param>
/// <param name="principalColumns">主键列。</param>
/// <param name="onUpdate">更新时候对应的操作。</param>
/// <param name="onDelete">删除时候对应的操作。</param>
/// <param name="action">添加扩展操作。</param>
/// <returns>返回迁移构建实例。</returns>
public virtual CreateTableBuilder <TEntity> ForeignKey <TPrincipal>(
Expression <Func <TEntity, object> > columns,
Expression <Func <TPrincipal, object> > principalColumns = null,
ReferentialAction onUpdate = ReferentialAction.NoAction,
ReferentialAction onDelete = ReferentialAction.NoAction,
Action <OperationBuilder <AddForeignKeyOperation> > action = null)
{
Check.NotNull(columns, nameof(columns));
var operation = new AddForeignKeyOperation
{
Table = Operation.Table,
Columns = columns.GetPropertyNames(),
PrincipalTable = typeof(TPrincipal).GetTableName(),
OnUpdate = onUpdate,
OnDelete = onDelete
};
if (principalColumns == null)
{
operation.PrincipalColumns = operation.Columns;
}
else
{
operation.PrincipalColumns = principalColumns.GetPropertyNames();
}
operation.Name = OperationHelper.GetName(NameType.ForeignKey, operation.Table, operation.Columns,
operation.PrincipalTable);
Operation.ForeignKeys.Add(operation);
action?.Invoke(new OperationBuilder <AddForeignKeyOperation>(operation));
return(this);
}
/// <summary>
/// 添加唯一键。
/// </summary>
/// <param name="columns">列。</param>
/// <param name="action">添加扩展信息。</param>
/// <returns>返回迁移构建实例。</returns>
public virtual CreateTableBuilder <TEntity> UniqueConstraint(
Expression <Func <TEntity, object> > columns,
Action <OperationBuilder <AddUniqueConstraintOperation> > action = null)
{
Check.NotNull(columns, nameof(columns));
var operation = new AddUniqueConstraintOperation
{
Table = Operation.Table,
Columns = columns.GetPropertyNames()
};
operation.Name = OperationHelper.GetName(NameType.UniqueKey, operation.Table, operation.Columns);
Operation.UniqueConstraints.Add(operation);
action?.Invoke(new OperationBuilder <AddUniqueConstraintOperation>(operation));
return(this);
}
/// <summary>
/// 添加主键。
/// </summary>
/// <param name="action">添加扩展信息。</param>
/// <returns>返回迁移构建实例。</returns>
public virtual CreateTableBuilder <TEntity> PrimaryKey(Action <OperationBuilder <AddPrimaryKeyOperation> > action = null)
{
var key = _entity.PrimaryKey;
if (key == null)
{
return(this);
}
var operation = new AddPrimaryKeyOperation
{
Table = Operation.Table,
Columns = key.Properties.Select(p => p.Name).ToArray()
};
operation.Name = OperationHelper.GetName(NameType.PrimaryKey, operation.Table);
Operation.PrimaryKey = operation;
action?.Invoke(new OperationBuilder <AddPrimaryKeyOperation>(operation));
return(this);
}