(0, _ , {'field': value}) creates a new record and links it to this one.
(1, id, {'field': value}) updates the values on an already linked record.
(2, id, _) removes the link to and deletes the id related record.
(3, id, _) removes the link to, but does not delete, the id related record. This is usually what you will use to delete related records on many-to-many fields.
(4, id, _) links an already existing record.
(5, _, _) removes all the links, without deleting the linked records.
(6, _, [ids]) replaces the list of linked records with the provided list.
（0，_，{field:value}）创建一个新记录并将其链接到此记录。
（1，id，{field:value}）更新已链接记录上的值。
（2，id，_）删除指向并删除id相关记录的链接。
（3，id，_）删除指向id相关记录的链接，但不删除该记录。这通常是用于删除多对多字段上的相关记录的内容。
（4，id，_）链接已存在的记录。
（5，_，_）删除所有链接，而不删除链接的记录。
（6，_，[id]）用提供的列表替换链接记录列表。