Database
[{"metadata":{"custom_metadata":[{"key_id":"6052e700dc84ef7d492b5d30","type":"freetext",value:["desh","abc"]}],"tag_ids":[],"category_id":"5a02e20a23dfee730bbd7f4f",}}]
Query
db.collection.update({"metadata.custom_metadata.value":"desh"},{"$set":{"metadata.custom_metadata.$[].value.$[v]":"Desh ki Dharti"}},{arrayFilters:[{"v":"desh"}]})