async function collectionGroupQuery()

in firestore/main/index.js [783:835]

• 47 lines of code
• 1 McCabe index (conditional complexity)

async function collectionGroupQuery(db) {
  // [START firestore_query_collection_group_dataset]
  const citiesRef = db.collection('cities');

  await citiesRef.doc('SF').collection('landmarks').doc().set({
    name: 'Golden Gate Bridge',
    type: 'bridge'
  });
  await citiesRef.doc('SF').collection('landmarks').doc().set({
    name: 'Legion of Honor',
    type: 'museum'
  });
  await citiesRef.doc('LA').collection('landmarks').doc().set({
    name: 'Griffith Park',
    type: 'park'
  });
  await citiesRef.doc('LA').collection('landmarks').doc().set({
    name: 'The Getty',
    type: 'museum'
  });
  await citiesRef.doc('DC').collection('landmarks').doc().set({
    name: 'Lincoln Memorial',
    type: 'memorial'
  });
  await citiesRef.doc('DC').collection('landmarks').doc().set({
    name: 'National Air and Space Museum',
    type: 'museum'
  });
  await citiesRef.doc('TOK').collection('landmarks').doc().set({
    name: 'Ueno Park',
    type: 'park'
  });
  await citiesRef.doc('TOK').collection('landmarks').doc().set({
    name: 'National Museum of Nature and Science',
    type: 'museum'
  });
  await citiesRef.doc('BJ').collection('landmarks').doc().set({
    name: 'Jingshan Park',
    type: 'park'
  });
  await citiesRef.doc('BJ').collection('landmarks').doc().set({ 
    name: 'Beijing Ancient Observatory',
    type: 'museum'
  });
  // [END firestore_query_collection_group_dataset]

  // [START firestore_query_collection_group_filter_eq]
  const querySnapshot = await db.collectionGroup('landmarks').where('type', '==', 'museum').get();
  querySnapshot.forEach((doc) => {
    console.log(doc.id, ' => ', doc.data());
  });
  // [END firestore_query_collection_group_filter_eq]
}