How to solve this ASP.NET MVC data null constructor warning on DbContext?

Question

The following code is from the official MS documentation; I followed as same for to solve this warning issues.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Models;

namespace MvcMovie.Data
{
    public class MvcMovieContext : DbContext
    {
        public MvcMovieContext (DbContextOptions<MvcMovieContext> options)
            : base(options)
        {
        }

        public DbSet<MvcMovie.Models.Movie> Movie { get; set; }
    }
}

official MS Documents

Everything in documentation

Svyatoslav Danyliv
– Svyatoslav Danyliv

2022-01-11 07:36:06 +00:00
Commented Jan 11, 2022 at 7:36 — Svyatoslav Danyliv
– Svyatoslav Danyliv, Commented Jan 11, 2022 at 7:36
Make it Nullable using ?.

Hiren Patel
– Hiren Patel

2022-01-11 12:28:24 +00:00
Commented Jan 11, 2022 at 12:28 — Hiren Patel
– Hiren Patel, Commented Jan 11, 2022 at 12:28

Serge · Accepted Answer · 2022-01-11 15:13:24Z

3

in the document link you posted , you should have founnd this warning

"To eliminate the warnings from nullable reference types, REMOVE the following line from the MvcMovie.csproj file "

<Nullable>enable</Nullable>

answered Jan 11, 2022 at 15:13

Serge

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Comments

Flood · Accepted Answer · 2022-01-11 09:55:02Z

2

In you MvcMovieContext class, instread that :

public DbSet<MvcMovie.Models.Movie> Movie { get; set; }

Simply do that :

public DbSet<MvcMovie.Models.Movie>? Movie { get; set; }

And it's done. Otherwise tell me if it doesn't work.

answered Jan 11, 2022 at 9:55

Flood

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3 Comments

karthik Over a year ago

Thank You its Working fine now without any warring

Flood Over a year ago

No problem. Don't forget to click on the upper arrow on the answer for validate it.

Aytsemik Over a year ago

But this will cause a null warning everywhere else that I use 'Movie'.

Ryan McDonough · Accepted Answer · 2022-09-07 21:43:57Z

0

The best way remove this line in .csproj => Nullable enable Nullable If you do like this :

public DbSet<MvcMovie.Models.Movie>? Movie { get; set; }

It will Warning in other files

edited Sep 7, 2022 at 21:43

Ryan McDonough

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answered Sep 2, 2022 at 17:09

dostonbek kurbanov

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