In my MongoDB collection, I have documents that contain an object called alltags, which is an array of strings. I know how to search for a specific string within these arrays using
collection.find({alltags:"searchstring"})For example, how can I execute the query
collection.find({alltags:"searchstring1", {alltags:"searchstring2"}})When searching through a collection, you can use the $all operator to find documents where the alltags field is an array containing both searchstring1 and searchstring2:
db.collection.find( { "alltags": { "$all": [ "searchstring1", "searchstring2" ] } } )
This query is similar in function to using an $and operation with the specified values, as shown below:
{ "alltags": { "$all": [ "searchstring1" , "searchstring2" ] } }
which is essentially equivalent to:
{ "$and": [ { "alltags": "searchstring1" }, { "alltags": "searchstring2" } ] }
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