php - Mongo - Array query, only find where all elements match -


i'm trying create mongo query return results arrays have specific element set false.

an example data record :- 

images: [     {         id: objectid("516bef7fc05e877b31000000"),         primary: true     },     {         id: objectid("516bef2ac05e879622000000"),         primary: false     },     {         id: objectid("516beeb7c05e879e2a000000"),         primary: false     } ], name: "test", etc: "etc"

i wish find documents primary fields set false (using no query selectors or elemmatch) mongo return document because @ least 1 of array elements match.

how make mongo return documents match search parameters?

many thanks.

you can aggregation framework quite easily:

db.so.aggregate( [     { $unwind: "$images" },     { $group: {          _id: '$_id',          all: { $sum: 1 },         all_primary: { $sum: { $cond: [ { $eq: [ '$images.primary', true ] }, 1, 0 ] } },         images: { $push: '$images' },         name: { $first: '$name' },         etc: { $first: '$etc' },     } },     { $project: {         _id: 1,         images: 1,         name: 1,         etc: 1,         same: { $cond: [ { $eq: [ '$all', '$all_primary' ] }, 1, 0 ] }     } },     { $match: { 'same' : 1 } }  ] );

with input:

{     "_id" : objectid("5203730bf8eaa52a846ebc3e"),     "images" : [         {             "id" : objectid("516bef7fc05e877b31000000"),             "primary" : true         },         {             "id" : objectid("516bef2ac05e879622010000"),             "primary" : true         },         {             "id" : objectid("516beeb7c05e879e2a000010"),             "primary" : true         }     ],     "name" : "derick",     "etc" : true } {     "_id" : objectid("52037315f8eaa52a846ebc3f"),     "images" : [         {             "id" : objectid("516bef7fc05e877b31000000"),             "primary" : true         },         {             "id" : objectid("516bef2ac05e879622010000"),             "primary" : true         },         {             "id" : objectid("516beeb7c05e879e2a000020"),             "primary" : false         }     ],     "name" : "james",     "etc" : true } {     "_id" : objectid("520373621a78238235b6ffbf"),     "images" : [         {             "id" : objectid("516bef7fc05e877b31000000"),             "primary" : true         },         {             "id" : objectid("516bef2ac05e879622010000"),             "primary" : true         },         {             "id" : objectid("516beeb7c05e879e2a000020"),             "primary" : false         }     ],     "name" : "james",     "etc" : true } {     "_id" : objectid("5203736b1a78238235b6ffc0"),     "images" : [         {             "id" : objectid("516bef7fc05e877b31000000"),             "primary" : true         },         {             "id" : objectid("516bef2ac05e879622010000"),             "primary" : true         },         {             "id" : objectid("516beeb7c05e879e2a000020"),             "primary" : true         }     ],     "name" : "james",     "etc" : true }

this outputs:

{     "result" : [         {             "_id" : objectid("5203736b1a78238235b6ffc0"),             "images" : [                 {                     "id" : objectid("516bef7fc05e877b31000000"),                     "primary" : true                 },                 {                     "id" : objectid("516bef2ac05e879622010000"),                     "primary" : true                 },                 {                     "id" : objectid("516beeb7c05e879e2a000020"),                     "primary" : true                 }             ],             "name" : "james",             "etc" : true,             "same" : 1         },         {             "_id" : objectid("5203730bf8eaa52a846ebc3e"),             "images" : [                 {                     "id" : objectid("516bef7fc05e877b31000000"),                     "primary" : true                 },                 {                     "id" : objectid("516bef2ac05e879622010000"),                     "primary" : true                 },                 {                     "id" : objectid("516beeb7c05e879e2a000010"),                     "primary" : true                 }             ],             "name" : "derick",             "etc" : null,             "same" : 1         }     ],     "ok" : 1 }

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