SUPPOSE I HAVE THIS FIRESTORE DATABASE:
collection > document_1 > user > doc1 > field1: value1
field2: value2
///////////> document_2 > user > doc2 > field3: value3
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ernest fokam
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1Please note that all-caps is often perceived as yelling, which might explain the number of downvotes you attracted. – Frank van Puffelen Sep 21 '21 at 20:58
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The question should exist within the the body of text in your post (not in just the title). – SpaceKatt Sep 21 '21 at 21:05
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If I understand your post correctly you want to access a specific subcollection of all documents. If so, you are looking for a collection group query, which reads documents from all collections with a specific name.
Accessing that in Python is (according to the documentation linked above) done with:
museums = db.collection_group(u'landmarks')\
.where(u'type', u'==', u'museum')
docs = museums.stream()
for doc in docs:
print(f'{doc.id} => {doc.to_dict()}')
So this would query across all documents in collections named u'landmarks, no matter where in the database those collections exist.
Frank van Puffelen
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I want to acces every document inside the subcollection user for all document inside the collection collection – ernest fokam Sep 21 '21 at 21:32
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That's possible too. See https://stackoverflow.com/questions/68049541/collectiongroupquery-but-limit-search-to-subcollections-under-a-particular-docum/68049847#68049847 – Frank van Puffelen Sep 21 '21 at 23:30