[GitHub] [openwhisk-runtime-dotnet] dmlo opened a new issue #39: Action cannot load Microsoft.Extensions.DependencyInjection.Abstraction

[GitBox <gi...@apache.org>]

dmlo opened a new issue #39: Action cannot load Microsoft.Extensions.DependencyInjection.Abstraction
URL: https://github.com/apache/openwhisk-runtime-dotnet/issues/39
 
 
   I have a c# OpenWhisk Action:
   ```csharp
   using System;
   using IHWhisk.Models;
   using Newtonsoft.Json.Linq;
   
   namespace IHWhisk
   {
       public class Hello
       {
           public JObject Main(JObject args)
           {
               var handian = new Handian();
   
               string errorText = "";
               
               try
               {
                   using var db = new IHDbContext();
                   db.Handians.Add(handian);
                   db.SaveChanges();
               }
               catch (Exception e)
               {
                   errorText = e.Message;
               }
   
               var message = new JObject();
               message.Add("Content-Type", new JValue("application/json"));
               message.Add("body", new JValue($"<p>Error: {errorText}</p>"));
               return message;
           }
       }
   }
   ```
   which uses EF Core dependency injection to configure and access the database, like so:
   ```csharp
   using System;
   using Microsoft.EntityFrameworkCore;
   using IHWhisk.Models;
   
   namespace IHWhisk
   {
       public class IHDbContext : DbContext
       {
           public DbSet<Handian> Handians { get; set; }
   
           protected override void OnConfiguring(DbContextOptionsBuilder builder)
           {
               var connectionString = "Server=#.#.#.#;Database=ih;Port=5432;User Id=postgres;Password=supersecretpassword";
               builder
                   .UseNpgsql(connectionString, o
                       => o.EnableRetryOnFailure());
           }
   
           protected override void OnModelCreating(ModelBuilder modelBuilder)
           {
               modelBuilder
                   .HasPostgresExtension("uuid-ossp")
                   .Entity<BaseEntity>(entity =>
                   {
                       entity.HasIndex("Discriminator");
                       entity.Property(p => p.Uuid)
                           .HasDefaultValueSql("uuid_generate_v4()"); // All IH entities get a postgres Uuid4
                   })
                   .Entity<Handian>(entity => { entity.Property<DateTime>(p => p.Birthday).HasDefaultValueSql("now()"); });
           }
       }
   }
   ```
   which when run inside my OpenWhisk installation fails with the error:
   
   ```
   Error: Could not load file or assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=3.1.3.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. Could not find or load a specific file. (0x80131621)
   ```
   I test this Action locally by invoking it from a clean console app like so:
   ```csharp
   namespace WhiskTester
   {
       class Program
       {
           static void Main(string[] args)
           {
               var ihwhisk = new IHWhisk.Hello();
               var callArgs = new JObject();
               var result = ihwhisk.Main(callArgs);
               Console.WriteLine(result);
           }
       }
   }
   ```
   It works when tested locally... a new record is written to the database as expected.
   
   Things I've tried to resolve the issue:
   * Successfully performed a DB insert without EF Core, ruling out a DB misconfiguration or a problem with the NGPSQL drivers
   * Replaced NGPSQL with Microsoft's SQLite driver and replicated the issue to further rule out a NGPSQL problem
   * Verified that Microsoft.Extensions.DependencyInjection.Abstractions.dll v3.1.3 is in the zip file I am sending to OpenWhisk
   * Downgraded Microsoft.EntityFrameworkCore, Microsoft.EntityFrameworkCore.Abstractions, Microsoft.EntityFrameworkCore.Design, Microsoft.EntityFrameworkCore.Tools and Npgsql.EntityFrameworkCore.PostgreSQL to version 3.1.2. The error message now references missing `Microsoft.Extensions.DependencyInjection.Abstractions, Version=3.1.2.0`
   
   At this point I've reached the edge of my knowledge and would be grateful for any advice or guidance you could offer.

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