Include function not working with pgsql and .net core 2.1

I try to add countries in my address object like this

public IActionResult  AllAddress()
{
    var AllAddresses = _context.Addresses.Include(a=>a.Country);
    var result = new
    {
        Addresses = AllAddresses
    };

   return Ok(result);
}

but it just loop and and give me

http://localhost:9807/api/Addresses/all net::ERR_CONNECTION_RESET 200 (OK)

kindly note if I remove include function and return only _context.Addresses it working fine without any issue ,also I check the database and I am sure every foreign key in address has it’s primary key in country , kindly help

[austindrenski]

You should adjust your JSON serialization settings to ignore circular references, like so:

services.AddMvc()
        .SetCompatibilityVersion(CompatibilityVersion.Version_2_1)
        .AddJsonOptions(x =>
        {
            // or ReferenceLoopHandling.Ignore
            x.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Serialize; 
            x.SerializerSettings.PreserveReferencesHandling = PreserveReferencesHandling.None;
        })

I’m going to close this issue now, as this is not related to EF Core. Please feel free to continue posting if you have additional questions or issues related to EF Core or the Npgsql provider.

[austindrenski]

@alrazyreturn wrote:

after I install the below package

Install-Package Npgsql.EntityFrameworkCore.PostgreSQL.Design
Install-Package Microsoft.EntityFrameworkCore.Tools
Install-Package Npgsql.EntityFrameworkCore.PostgreSQL -Version 2.1.2
Install-Package Microsoft.EntityFrameworkCore.Proxies -Version 2.1.4

You do not need to add Npgsql.EntityFrameworkCore.PostgreSQL.Design. That package is no longer maintained.

@alrazyreturn wrote:

Can you please reproduce your issue with a quick and simple console application, instead of using ASP.NET? This will allow us to isolate and understand things better.

could you please see this project it’s so simple I just create new core vue project and add to it my database using this command https://github.com/alrazyreturn/core_project

That project is far too involved for us to evaluate. As @roji wrote, we would need a minimal reproduction of this issue in the form of a console application that does not use ASP.NET Core.

Before going any further, try the following and please report back:

public IActionResult  AllAddress()
{
    var AllAddresses = _context.Addresses.Include(a=>a.Country);
    var result = new
    {
        Addresses = AllAddresses.ToList() // enumerate here in-scope
    };

   return Ok(result);
}