firebase 无法将元素类型“Stream< dynamic>”分配给列表类型“Stream〈Query Snapshot〈Object？>>"

mklgxw1f 于 2023-01-02 发布在其他

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Stream<List<QuerySnapshot>> getData() {
Stream stream1 = FirebaseFirestore.instance.collection('Gib Role').where('id', isEqualTo: 'false').orderBy('timestamp').snapshots();
Stream stream2 = FirebaseFirestore.instance.collection('Register').where('id', isEqualTo: 'true').orderBy('timestamp').snapshots();
return StreamZip([stream1,stream2]); }

以上错误在流1和流2上可见，如何清除此错误，请任何人帮助我

firebase

来源：https://stackoverflow.com/questions/74960237/the-element-type-streamdynamic-cant-be-assigned-to-the-list-type-streamqu

1条答案

按热度按时间

trnvg8h31#

试试这个：

Stream<List<QuerySnapshot<Object?>>> getData() {
Stream<QuerySnapshot<Object?>> stream1 = FirebaseFirestore.instance.collection('Gib Role').where('id', isEqualTo: 'false').orderBy('timestamp').snapshots();
Stream<QuerySnapshot<Object?>> stream2 = FirebaseFirestore.instance.collection('Register').where('id', isEqualTo: 'true').orderBy('timestamp').snapshots();
return StreamZip([stream1,stream2]); }

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firebase 无法将元素类型“Stream< dynamic>”分配给列表类型“Stream〈Query Snapshot〈Object？>>"

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