mongodb query for null code example

Example 1: mongodb exists and not null

db.collection1.find({ 'fieldname1' : { $exists: true, $ne: null } });

Example 2: mongo db returning null in array of string graphql

// Using the same query as aboveconst result = await client.query({ query: query });if (result.data.restaurants) {  result.data.restaurants.forEach(restaurant => {    if (restaurant) {      console.log(restaurant.name);      console.log(restaurant.location.address);    }  });}