Export and Import Mongodb commands

To restore earlier database

mongorestore -d dbname -c users C:/mypath/to/old/dbname

To export a collection

mongoexport –db envyd –collection categories –out users_remote.json

To import a collection

mongoimport –db envyd –collection posts –file posts.json

To Update Single or Multiple records



		


To Query a collection for an array type field, by the length or array comparison

{ $where: “if (this.media && this.media.length > 1) {return this; } “}

Query with multiple fields is as simple as writing general javascript condition

{ $where: “if (this.media && this.media.length > 1 && this.status==’Published’) {return this; } “}

To Query by doing comparison on ObjectId type field



		


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