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REST API POST - Check if each nested object exists. If no, create new. If yes, return existing object

原文 2016-08-09 13:58:37 0 1 python/ django/ rest/ django-rest-framework/ api-design

I'm somewhat new to RESTful API design practice and looking for help. The data model I'm working with details a top-level object (eg Book) containing a list of a nested objects (eg Chapters).
Each Chapter is persisted in its own right and has a simple_name field that is set to unique=True (ie. only one Chapter with Chapter.simple_name = "ch_01" may exist).

Scenario : A user POSTs a Book ("myBook_v1") containing Chapters, "ch_01", "ch_02", and "ch_03". The user then edits their book and the next day POSTs "myBook_v2" containing Chapters, "ch_01", "ch_02", "ch_03", and "ch_04" . Suppose that Chapters "ch_01", "ch_02", "ch_03" are unchanged from the original POST.

Currently, since simple_name is required to be unique, the second POST does not pass uniqueness validation and an error response is returned to the user.

Question : Would the following implementation fit REST design principles? And, most importantly, is this a good (safe) design choice?

Implementation : Upon Book POST, check each Chapter.simple_name for uniqueness. If Chapter.simple_name already exists in database, skip creation. If it does not exist, create new Chapter. Return complete persisted Book with a mix of newly created Chapters and already existing Chapters. The only criteria for deciding to create new or use existing is whether or not the user-specified simple_name already exists for a Chapter in the database.

1 answers

这里的想法是通过删除关联的验证器来消除唯一性约束，然后自行处理添加/更新/删除（请参阅Django Rest Framework上的嵌套序列化程序的唯一验证）。

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REST API POST - Check if each nested object exists. If no, create new. If yes, return existing object

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1 answers

solution1 0 2016-08-09 14:48:57

solution1
0 2016-08-09 14:48:57