MockQueryable | Mocking Entity Framework Core operations such ToListAsync | Form library

 by   romantitov C# Version: v7.0 License: MIT

kandi X-RAY | MockQueryable Summary

MockQueryable is a C# library typically used in User Interface, Form applications. MockQueryable has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.
Extensions for mocking Entity Framework Core (EFCore) operations such ToListAsync, FirstOrDefaultAsync etc. by Moq, NSubstitute or FakeItEasy When writing tests for your application it is often desirable to avoid hitting the database. The extensions allow you to achieve this by creating a context – with behavior defined by your tests – that makes use of in-memory data.
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                        MockQueryable has a low active ecosystem.
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                        It has 554 star(s) with 62 fork(s). There are 6 watchers for this library.
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                        There were 1 major release(s) in the last 6 months.
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                        There are 4 open issues and 32 have been closed. On average issues are closed in 7 days. There are 2 open pull requests and 0 closed requests.
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                        It has a neutral sentiment in the developer community.
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                        The latest version of MockQueryable is v7.0
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                                                MockQueryable has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
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                                                            MockQueryable is licensed under the MIT License. This license is Permissive.
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                                                                        Installation instructions are not available. Examples and code snippets are available.
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                                                                                  MockQueryable Key Features

                                                                                  Mocking Entity Framework Core operations such ToListAsync, FirstOrDefaultAsync etc

                                                                                  MockQueryable Examples and Code Snippets

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                                                                                  Community Discussions

                                                                                  Trending Discussions on MockQueryable

                                                                                  I get the following error when I add paging "IQueryable doesn't implement IAsyncQueryProvider"
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                                                                                  QUESTION

                                                                                  I get the following error when I add paging "IQueryable doesn't implement IAsyncQueryProvider"
                                                                                  Asked 2020-Sep-04 at 07:41

                                                                                  I want to implement paging for MVC .NetCore application. I have a list " List<_Item> Items which i got from azure blob" I get the following error when I add paging "IQueryable doesn't implement IAsyncQueryProvider"

                                                                                  Paging I'm trying to Implement: https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/sort-filter-page?view=aspnetcore-3.1

                                                                                  Possible solutions I tried looking at: https://github.com/romantitov/MockQueryable

                                                                                  HomeController: Index function

                                                                                  [Obsolete]
                                                                                          public async Task Index(string outletId, string contractId, string sort, string currentFilter, int? pageNumber)
                                                                                          {
                                                                                              ViewData["CurrentSort"] = sort;
                                                                                              ViewData["OutletId"] = String.IsNullOrEmpty(sort) ? "descending outletId" : "";
                                                                                              ViewData["ContractId"] = sort == "ContractId" ? "descending contractId" : "ContractId";
                                                                                  
                                                                                              if (outletId != null || contractId != null)
                                                                                              {
                                                                                                  pageNumber = 1;
                                                                                              }
                                                                                              else
                                                                                              {
                                                                                                  outletId = currentFilter;
                                                                                                  contractId = currentFilter;
                                                                                              }
                                                                                  
                                                                                              blobServices.Add_Tags_on_Blob("GSS_EDM_WorkHistoryTerminationsEngagementsIRP5Request_Dev.csv");
                                                                                              // List<_Item> Items = (List<_Item>)blobServices.Get_BlobItem_List();
                                                                                  
                                                                                              List<_Item> Items = (List<_Item>)blobServices.Find_Blob_By_Tag(outletId, contractId);
                                                                                              var records = Items.AsQueryable();
                                                                                  
                                                                                              switch (sort)
                                                                                              {
                                                                                  
                                                                                                  case "descending outletId":
                                                                                                      records = records.OrderByDescending(x => x.OutletId);
                                                                                                      break;
                                                                                  
                                                                                                  case "descending contractId":
                                                                                                      records = records.OrderByDescending(x => x.ContractId);
                                                                                                      break;
                                                                                  
                                                                                                  case "ContractId":
                                                                                                      records = records.OrderBy(x => x.ContractId);
                                                                                                      break;
                                                                                  
                                                                                                  default:
                                                                                                      records = records.OrderBy(x => x.OutletId);
                                                                                                      break;
                                                                                  
                                                                                              }
                                                                                  
                                                                                              int pageSize = 3;
                                                                                              return View(await PaginatedList<_Item>.CreateAsync(records, pageNumber ?? 1, pageSize));
                                                                                              // return View(Items.ToPagedList(pageNumber ?? 1, 10));
                                                                                          }
                                                                                  

                                                                                  Paging Class[Lines of code with error HomeController

                                                                                  1 Lines of code with error; Pagging Class

                                                                                  public class PaginatedList : List
                                                                                      {
                                                                                          public int PageIndex { get; private set; }
                                                                                          public int TotalPages { get; private set; }
                                                                                  
                                                                                          public PaginatedList(List items, int count, int pageIndex, int pageSize)
                                                                                          {
                                                                                              PageIndex = pageIndex;
                                                                                              TotalPages = (int)Math.Ceiling(count / (double)pageSize);
                                                                                  
                                                                                              this.AddRange(items);
                                                                                          }
                                                                                  
                                                                                          public bool HasPreviousPage
                                                                                          {
                                                                                              get
                                                                                              {
                                                                                                  return (PageIndex > 1);
                                                                                              }
                                                                                          }
                                                                                  
                                                                                          public bool HasNextPage
                                                                                          {
                                                                                              get
                                                                                              {
                                                                                                  return (PageIndex < TotalPages);
                                                                                              }
                                                                                          }
                                                                                  
                                                                                          public static async Task> CreateAsync(IQueryable source, int pageIndex, int pageSize)
                                                                                          {
                                                                                              var count = await source.CountAsync();
                                                                                              var items = await source.Skip((pageIndex - 1) * pageSize).Take(pageSize).ToListAsync();
                                                                                              return new PaginatedList(items, count, pageIndex, pageSize);
                                                                                          }
                                                                                  

                                                                                  ANSWER

                                                                                  Answered 2020-Sep-04 at 07:41

                                                                                  According to the error message, we could find The provider for the source IQueryable doesn't implement IAsyncQueryProvider. Only providers that implement IAsyncQueryProvider can be used for Entity Framework asynchronous operations..

                                                                                  We couldn't let List.AsQueryable() to use ToListAsync method, since it doesn't implement the IAsyncQueryProvider.

                                                                                  To solve this issue, you could modify the PaginatedList method's CreateAsync method like below:

                                                                                      public static   PaginatedList Create(IQueryable source, int pageIndex, int pageSize)
                                                                                      {
                                                                                          var count =   source.Count();
                                                                                          var items =  source.Skip((pageIndex - 1) * pageSize).Take(pageSize).ToList();
                                                                                  
                                                                                          return new PaginatedList(items, count, pageIndex, pageSize);
                                                                                      }
                                                                                  

                                                                                  Usage:

                                                                                          return View( PaginatedList<_Item>.Create(records, pageNumber ?? 1, pageSize));
                                                                                  

                                                                                  Source https://stackoverflow.com/questions/63727970

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