4.10 Plugin No constructor was found that had all the dependencies satisfied.

i'm trying to practice as im new to development in nopcommerce plugin. I'm trying to make a plugin to add/edit record to a sql table fiels: ID, RecordName

When I open up the admin interface and plugins and click Install I get the error No constructor was found that had all the dependencies satisfied.




DependencyRegistrar.cs

    public class DependencyRegistrar : IDependencyRegistrar
    {
        private const string CONTEXT_NAME = "nop_object_context_random_sql";
        public virtual void Register(ContainerBuilder builder, ITypeFinder typeFinder, NopConfig config)
        {
            builder.RegisterType<RandomSQLService>().As<RandomSQLService>().InstancePerLifetimeScope();
            builder.RegisterPluginDataContext<RandomSQLObjectContext>(CONTEXT_NAME);
            
            builder.RegisterType<EfRepository<RandomSQLRecord>>().As<IRepository<RandomSQLRecord>>()
                .WithParameter(ResolvedParameter.ForNamed<IDbContext>(CONTEXT_NAME))
                .InstancePerLifetimeScope();
        }
        public int Order => 1;
    }

RandomSQLPlugin.cs (in the root of the plugin solution)

namespace Nop.Plugin.Widgets.RandomSQL
{
   public class RandomSQLPlugin : BasePlugin
    {
        private RandomSQLObjectContext _context;

        public RandomSQLPlugin(RandomSQLObjectContext context)
        {
            _context = context;
        }

        public override void Install()
        {
            _context.Install();
            base.Install();
        }

        public override void Uninstall()
        {
            _context.Uninstall();
            base.Uninstall();
        }      
    }
}

RandomSQLObjectContext.cs  

public class RandomSQLObjectContext : DbContext, IDbContext
    {
        public RandomSQLObjectContext(DbContextOptions<RandomSQLObjectContext> options) : base(options)
        {
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            modelBuilder.ApplyConfiguration(new RandomSQLMap());
            base.OnModelCreating(modelBuilder);
        }
        public virtual string GenerateCreateScript()
        {
            return this.Database.GenerateCreateScript();
        }

        public void Install()
        {
            this.ExecuteSqlScript(this.GenerateCreateScript());
        }

        public void Uninstall()
        {
            this.DropPluginTable("RandomSQL");
        }
        public virtual new DbSet<TEntity> Set<TEntity>() where TEntity : BaseEntity
        {
            return base.Set<TEntity>();
        }


        Microsoft.EntityFrameworkCore.DbSet<TEntity> IDbContext.Set<TEntity>()
        {
            throw new System.NotImplementedException();
        }


        public IQueryable<TQuery> QueryFromSql<TQuery>(string sql) where TQuery : class
        {
            throw new System.NotImplementedException();
        }

        public IQueryable<TEntity> EntityFromSql<TEntity>(string sql, params object[] parameters) where TEntity : BaseEntity
        {
            throw new System.NotImplementedException();
        }

        public void Detach<TEntity>(TEntity entity) where TEntity : BaseEntity
        {
            throw new System.NotImplementedException();
        }

        public int ExecuteSqlCommand(RawSqlString sql, bool doNotEnsureTransaction = false, int? timeout = null, params object[] parameters)
        {
            using (var transaction = this.Database.BeginTransaction())
            {
                var result = this.Database.ExecuteSqlCommand(sql, parameters);
                transaction.Commit();

                return result;
            }
        }
    }

Hello,

May be pluginsdbstartup.cs file is missing.

Can you please recheck?

thats exactly what it was the file was missing. I copied it over from Shipping By Weight and change the content now the plugin installed.

thanks for the help!!