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method for mango query #324

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method for mango query #324

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@pirr pirr commented Sep 27, 2017 •
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I suggest implementation for mango query (only CouchDB 2) http://docs.couchdb.org/en/2.1.0/api/database/find.html.

I used django's filter implementation.
data = db.filter(field__subfield1__...__mango_operator = value)

data = db.filter(Q(field1__subfield1__...__mango_operator = value)
                          | Q(field2__subfield1__...__mango_operator = value)
                          & Q(field3__subfield1__...__mango_operator = value))

Work:

  1. Combination operators: http://docs.couchdb.org/en/2.1.0/api/database/find.html#combination-operators, except: $elemMatch, $allMatch.
  2. Condition operators http://docs.couchdb.org/en/2.1.0/api/database/find.html#condition-operators,
    not tested types: Object, Array-$size, Miscellaneous - $mod.
  3. Sort, limit, fields and other request json object but need test http://docs.couchdb.org/en/2.1.0/api/database/find.html#db-find

I will work on update. In first I would add Array operators - $elemMatch, $allMatch.

@pirr pirr mentioned this pull request Sep 27, 2017
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pirr commented Oct 3, 2017 •
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I added support for $elemMatch, maybe $allMatch (not tested).
aaf0395

feats: [{subfeat: 1, ...}, {subfeat: 2, ...}]
db.filter(feats_L_elemMatch__subfeat__eq = 1)

feats: ['FOO', 'BAR']
db.filter(feats_L_elemMatch__regex = '(?i)fo')

"_L_" - define "feats" field as list
"elemMatch__subfeat__eq" - selector on "subfeat" field

This can be bad implementation. I will be glad to suggestions.

@djc
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djc commented Oct 5, 2017

As you can see here, there are some test failures caused by this PR. Can you look at those and make sure they no longer fail?

@pirr
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pirr commented Oct 5, 2017

I fixed doctest. But travis log error:

couchdb.http.ServerError: (400, ('bad_request', 'Referer header required.'))

I not get this error in local test log.

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@pirr @djc