Feature to support 'in' clause based on jsonapi filter=1,2,3 - BUG: #189 #190

[rubenghio]

This is a simple and quick idea to support "IN" clause based on jsonapi specification:

filter[id]=1,2,3

Hope this helps

[coveralls]

Pull Request Test Coverage Report for Build 26

• 6 of 7 (85.71%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.003%) to 82.609%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
flask_combo_jsonapi/querystring.py	6	7	85.71%

Totals
Change from base Build 13:	0.003%
Covered Lines:	1254
Relevant Lines:	1518

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💛 - Coveralls

[Znbiz]

Hello, @rubenghio
Thanks for contributing to libraries

If the field in the database is of the List type, for example list_user = db.Column(db.List). In this case, we will no longer be able to simply filter out all records that have only 1.3 in the list ...

If you need in, use filter=[{"name": "id", "op": "in_", "val": [1, 2, 3]}]

[mahenzon]

Please consider providing tests for both cases when it's an array on the backend and when it's an int/str

from #35:

I think we have to do it this way: if value on the backend is not a collection type (not an ARRAY), but is an int or str, we should replace eq filter with in_ and parse incoming data as a list, not as a single value.

[igieon]

I submit pull request where you can use your custom QueryStringManager with test so you can use change eq and in as it is proposed in this request. Its this pull request #54 . Also in test method test_sqlalchemy_data_layer.test_get_list_with_simple_filter_relationship_custom_qs

[mahenzon]

looks good