A value of type 'Object?' can't be assigned to a variable of type 'List'.

and error in List data = snapshot.data;

Padding(
            padding: const EdgeInsets.symmetric(horizontal: 24),
            child: FutureBuilder(
              future: spaceProvider.getRecomendedSpace(),
              builder: (context, snapshot) {
                if (snapshot.hasData) {
                  List<Space> data = snapshot.data;
                  return Column(
                      children:
                          data.map((item) => SpaceCard(item)).toList());
                }
                return Center(
                  child: CircularProgressIndicator(),
                );
              },
            ),
          ),

CodePudding user response：

add type to theFutureBuilder widget, like this:

Padding(
            padding: const EdgeInsets.symmetric(horizontal: 24),
            child: FutureBuilder<List<Space>>( // here
              future: spaceProvider.getRecomendedSpace(),
              builder: (context, snapshot) {
                if (snapshot.hasData) {
                  List<Space> data = snapshot.data;
                  return Column(
                      children:
                          data.map((item) => SpaceCard(item)).toList());
                }
                return Center(
                  child: CircularProgressIndicator(),
                );
              },
            ),
          ),

note that the function spaceProvider.getRecomendedSpace() must return a List<Space>

CodePudding user response：

When calling a future inside FutureBuilder whatever we return from the future function moves to snapshot and by default type of snapshot is object so whenever you want to receive data in same type that you are returning, you have to tell snapshot it's type. by using AsyncSnapshot.

AsyncSnapshot<Type>

See Example below

Padding(
            padding: const EdgeInsets.symmetric(horizontal: 24),
            child: FutureBuilder(
              future: spaceProvider.getRecomendedSpace(),
              builder: (context,AsyncSnapshot<List<Space>> snapshot) {
                if (snapshot.hasData) {
                  List<Space> data = snapshot.data;
                  return Column(
                      children:
                          data.map((item) => SpaceCard(item)).toList());
                }
                return Center(
                  child: CircularProgressIndicator(),
                );
              },
            ),
          ),