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Add JSON function to models

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This commit is contained in:
Boris Milašinović
2026-04-22 22:49:47 +02:00
parent 087293f67e
commit 3e38889ada
5 changed files with 69 additions and 2 deletions
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7
DataAccess/EF_Demo/Data/DbJson.cs Normal file
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@@ -0,0 +1,7 @@
namespace EF_Demo.Data;
internal static class DbJson
{
public static string? JsonValue(string? expression, string path)
=> throw new NotSupportedException();
}

14
DataAccess/EF_Demo/Data/MSSQL/EventsContext.Custom.cs Normal file
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@@ -0,0 +1,14 @@
using Microsoft.EntityFrameworkCore;
namespace EF_Demo.Data.MSSQL;
public partial class EventsContext
{
partial void OnModelCreatingPartial(ModelBuilder modelBuilder)
{
modelBuilder
.HasDbFunction(typeof(DbJson).GetMethod(nameof(DbJson.JsonValue))!)
.HasName("JSON_VALUE")
.IsBuiltIn();
}
}

14
DataAccess/EF_Demo/Data/Postgres/EventsContext.Custom.cs Normal file
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@@ -0,0 +1,14 @@
using Microsoft.EntityFrameworkCore;
namespace EF_Demo.Data.Postgres;
public partial class EventsContext
{
partial void OnModelCreatingPartial(ModelBuilder modelBuilder)
{
modelBuilder
.HasDbFunction(typeof(DbJson).GetMethod(nameof(DbJson.JsonValue))!)
.HasName("jsonb_extract_path_text")
.IsBuiltIn();
}
}

12
DataAccess/EF_Demo/Demo.cs
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@@ -5,6 +5,7 @@ using EF_Demo.Data.MSSQL;
#endif
using EF_Demo.Models;
using EF_Demo.Data;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
@@ -86,6 +87,12 @@ internal class Demo(IDbContextFactory<EventsContext> contextFactory, ILogger<Dem
/// </summary>
internal void PrintPeople(int year)
{
#if POSTGRES
const string hrPath = "hr";
#else
const string hrPath = "$.hr";
#endif
using var ctx = contextFactory.CreateDbContext();
var query = ctx.People
.Where(p => p.BirthDate.Year == year)
@@ -97,11 +104,12 @@ internal class Demo(IDbContextFactory<EventsContext> contextFactory, ILogger<Dem
p.FirstName, p.LastName,
p.FirstNameTranscription, p.LastNameTranscription,
p.BirthDate,
Country = p.CountryCodeNavigation.Name
Country = p.CountryCodeNavigation.Name,
CountryHr = DbJson.JsonValue(p.CountryCodeNavigation.Translations, hrPath)
});
foreach (var p in query)
{
Console.WriteLine($"{p.FirstName} {p.LastName} ({p.FirstNameTranscription} {p.LastNameTranscription}), {p.Country} {p.BirthDate:dd.MM.yyyy.}");
Console.WriteLine($"{p.FirstName} {p.LastName} ({p.FirstNameTranscription} {p.LastNameTranscription}), {p.Country} / {p.CountryHr} {p.BirthDate:dd.MM.yyyy.}");
}
}
}

24
DataAccess/EF_Demo/EF_Demo.sln Normal file
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@@ -0,0 +1,24 @@
Microsoft Visual Studio Solution File, Format Version 12.00
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{C3669BE8-62DC-69A4-DA79-08849870583B}.Release|Any CPU.Build.0 = Release|Any CPU
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