How can I fix the error '2 positional arguments expected by '_buildCategoryList', but 1 found.' in flutter dependencies?

huangapple
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英文:

How can I fix the error '2 positional arguments expected by '_buildCategoryList', but 1 found.' in flutter dependencies?

问题

Here is the translated code:

  1. > 2个位置参数应该由'_buildCategoryList'期望，但只找到1个。
  3. 尝试添加缺少的参数
  5. Widget _categoriesList(WidgetRef ref) {
  6.     final categories = ref.watch(
  7.       categoriesProvider(
  8.         PaginationModel(page: 1, pageSize: 10),
  9.       ),
  10.     );
  11.     return categories.when(
  12.         data: (list) {
  13.           return _buildCategoryList(list!.cast<Category>(), ref);
  14.         },
  15.         error: (_, __) => const Center(
  16.               child: Text("ERR"),
  17.             ),
  18.         loading: () => const Center(
  19.               child: CircularProgressIndicator(),
  20.             ));
  21.   }
  23. Widget _buildCategoryList(List<Category> categories, WidgetRef ref) {
  24.  return Container(
  25.       child: ListView.builder(
  26.         shrinkWrap: true,
  27.         physics: const ClampingScrollPhysics(),
  28.         scrollDirection: Axis.horizontal,
  29.         itemCount: categories.length,
  30.         itemBuilder: (context, index) {
  31.           var data = categories[index];
  32.           return GestureDetector(
  33.             onTap: () {
  34.               ProductFilterModel filterModel = ProductFilterModel(
  35.                   paginationModel: PaginationModel(page: 1, pageSize: 10),
  36.                   categoryId: data.categoryId);
  38.               ref
  39.                   .read(productsFilterProvider.notifier)
  40.                   .setProductFilter(filterModel);
  41.               ref.read(productsNotifierProvider.notifier).getProducts();
  42.               Navigator.of(context).pushNamed("/products", arguments: {
  43.                 'categoryId': data.categoryId,
  44.                 'categoryName': data.categoryName,
  45.               });
  46.             },

Please note that I added the missing argument ref to the _buildCategoryList function call as required.

英文:

> 2 positional arguments expected by '_buildCategoryList', but 1 found.

Try adding the missing arguments

  1. Widget _categoriesList(WidgetRef ref) {
  2.     final categories = ref.watch(
  3.       categoriesProvider(
  4.         PaginationModel(page: 1, pageSize: 10),
  5.       ),
  6.     );
  7.     return categories.when(
  8.         data: (list) {
  9.           return _buildCategoryList(list!.cast&lt;Category&gt;());
  10.         },
  11.         error: (_, __) =&gt; const Center(
  12.               child: Text(&quot;ERR&quot;),
  13.             ),
  14.         loading: () =&gt; const Center(
  15.               child: CircularProgressIndicator(),
  16.             ));
  17.   }
  19. Widget _buildCategoryList(List&lt;Category&gt; categories, WidgetRef ref) {
  20.  return Container(
  21.       child: ListView.builder(
  22.         shrinkWrap: true,
  23.         physics: const ClampingScrollPhysics(),
  24.         scrollDirection: Axis.horizontal,
  25.         itemCount: categories.length,
  26.         itemBuilder: (context, index) {
  27.           var data = categories[index];
  28.           return GestureDetector(
  29.             onTap: () {
  30.               ProductFilterModel filterModel = ProductFilterModel(
  31.                   paginationModel: PaginationModel(page: 1, pageSize: 10),
  32.                   categoryId: data.categoryId);
  34.               ref
  35.                   .read(productsFilterProvider.notifier)
  36.                   .setProductFilter(filterModel);
  37.               ref.read(productsNotifierProvider.notifier).getProducts();
  38.               Navigator.of(context).pushNamed(&quot;/products&quot;, arguments: {
  39.                 &#39;categoryId&#39;: data.categoryId,
  40.                 &#39;categoryName&#39;: data.categoryName,
  41.               });
  42.             },

答案1

得分: 0

Since your _buildCategoryList widget has two arguments but you are
passing only one argument.

  1. Widget _categoriesList(WidgetRef ref) {
  2.   final categories = ref.watch(
  3.     categoriesProvider(
  4.       PaginationModel(page: 1, pageSize: 10),
  5.     ),
  6.   );
  7.   return categories.when(
  8.     data: (list) {
  9.       return _buildCategoryList(list!.cast<Category>(), ref); // Pass both arguments
  10.     },
  11.     error: (_, __) => const Center(
  12.       child: Text("ERR"),
  13.     ),
  14.     loading: () => const Center(
  15.       child: CircularProgressIndicator(),
  16.     ),
  17.   );
  18. }
英文:

Since your _buildCategoryList widget has two arguments but you are
passing only one argument.

  1. Widget _categoriesList(WidgetRef ref) {
  2.   final categories = ref.watch(
  3.     categoriesProvider(
  4.       PaginationModel(page: 1, pageSize: 10),
  5.     ),
  6.   );
  7.   return categories.when(
  8.     data: (list) {
  9.       return _buildCategoryList(list!.cast&lt;Category&gt;(), ref); // Pass both arguments
  10.     },
  11.     error: (_, __) =&gt; const Center(
  12.       child: Text(&quot;ERR&quot;),
  13.     ),
  14.     loading: () =&gt; const Center(
  15.       child: CircularProgressIndicator(),
  16.     ),
  17.   );
  18. }

huangapple
  • 本文由 发表于 2023年5月21日 09:30:40
  • 转载请务必保留本文链接：https://go.coder-hub.com/76297946.html
  • flutter
  • flutter-dependencies
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