Question

this is my collection structure :

coll{

id:...,

..,

fieldA:{

   fieldA1:[

       {

           ...

       }

   ],

   ...,

   fieldA2:[

       {

           text: "ciao",

       },

       {

           text: "hello",

       },

       ...  

   ] 

} 

...

}

i want to find the document with for example text=”ciao”
I use the follow:
Db.coll.find({fieldA: { fieldA2: {$elementMatch:{ text:”ciao”} } } })
but the result is nothing…
how can I do to do this operation?
thank u very match..

Answer 1

You need to use dot notation to refer to the embedded document:

db.coll.find({'fieldA.fieldA2': { $elemMatch:{ text:"ciao"} }})

Also note that the operator is $elemMatch, not $elementMatch.