{ “property_1”: “value_1”, “property_2”: “value_2”, “property_3”: { “_some_property_1”: 1, “_some_property_2”: “some_value_2”, “some_property_3”: “some_value_3”, “some_property_4”: “some_value_4” }, “property_4”: “value_4”, “property_5”: “value_5”, “iproperty_6”: “Nvalue_6”, “property_7”: “value_7”, “property_8”: “value_8”, “property_9”: “value_9” } this is one of the field of my document I want to extract some fields from property_3 using MongoDb Aggregation Pipeline .I have stored the whole […]