Google Firestore: Query on substring of a property value (text search)

Question

I am looking to add a simple search field, would like to use something like

collectionRef.where(\'name\', \'contains\', \'searchTerm\')

I tried

Answer 1

This worked for me perfectly but might cause performance issues.

Do this when querying firestore:

   Future searchResults = collectionRef
        .where('property', isGreaterThanOrEqualTo: searchQuery.toUpperCase())
        .getDocuments();

Do this in your FutureBuilder:

    return FutureBuilder(
          future: searchResults,
          builder: (context, snapshot) {           
            List searchResults = [];
            snapshot.data.documents.forEach((doc) {
              Model model = Model.fromDocumet(doc);
              if (searchQuery.isNotEmpty &&
                  !model.property.toLowerCase().contains(searchQuery.toLowerCase())) {
                return;
              }

              searchResults.add(model);
            })
   };