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SonicTheCatSonicTheCat
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ADVANCED QUERYING
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‎07.Advanced Querying/07. DB-Advanced-EF-Core-Advanced-Querying-Exercises.docx

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‎07.Advanced Querying/BookShop.Data/BookShop.Data.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netcoreapp2.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="2.2.0" />
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<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.0" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\BookShop.Models\BookShop.Models.csproj" />
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</ItemGroup>
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</Project>

‎07.Advanced Querying/BookShop.Data/BookShopContext.cs

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namespace BookShop.Data
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{
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using Microsoft.EntityFrameworkCore;
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using Models;
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using EntityConfiguration;
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public class BookShopContext : DbContext
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{
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public BookShopContext() { }
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public BookShopContext(DbContextOptions options)
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:base(options) { }
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public DbSet<Book> Books { get; set; }
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public DbSet<Category> Categories { get; set; }
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public DbSet<Author> Authors { get; set; }
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public DbSet<BookCategory> BooksCategories { get; set; }
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protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
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{
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if (!optionsBuilder.IsConfigured)
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{
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optionsBuilder.UseSqlServer(Configuration.ConnectionString);
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}
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}
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protected override void OnModelCreating(ModelBuilder modelBuilder)
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{
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modelBuilder.ApplyConfiguration(new AuthorConfiguration());
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modelBuilder.ApplyConfiguration(new BookCategoryConfiguration());
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modelBuilder.ApplyConfiguration(new BookConfiguration());
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modelBuilder.ApplyConfiguration(new CategoryConfiguration());
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}
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}
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}

‎07.Advanced Querying/BookShop.Data/Configuration.cs

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namespace BookShop.Data
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{
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internal class Configuration
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{
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internal static string ConnectionString => "Server=.;Database=BookShop;Integrated Security=True;";
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}
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}

‎07.Advanced Querying/BookShop.Data/EntityConfiguration/AuthorConfiguration.cs

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namespace BookShop.Data.EntityConfiguration
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{
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using Models;
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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internal class AuthorConfiguration : IEntityTypeConfiguration<Author>
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{
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public void Configure(EntityTypeBuilder<Author> builder)
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{
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builder.HasKey(e => e.AuthorId);
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builder.Property(e => e.FirstName)
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.IsRequired(false)
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.HasMaxLength(50);
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builder.Property(e => e.LastName)
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.IsRequired()
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.HasMaxLength(50);
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}
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}
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}

‎07.Advanced Querying/BookShop.Data/EntityConfiguration/BookCategoryConfiguration.cs

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namespace BookShop.Data.EntityConfiguration
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{
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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using Models;
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internal class BookCategoryConfiguration : IEntityTypeConfiguration<BookCategory>
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{
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public void Configure(EntityTypeBuilder<BookCategory> builder)
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{
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builder.HasKey(e => new { e.BookId, e.CategoryId });
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builder.HasOne(e => e.Category)
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.WithMany(c => c.CategoryBooks)
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.HasForeignKey(e => e.CategoryId);
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builder.HasOne(e => e.Book)
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.WithMany(c => c.BookCategories)
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.HasForeignKey(e => e.BookId);
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}
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}
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}

‎07.Advanced Querying/BookShop.Data/EntityConfiguration/BookConfiguration.cs

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namespace BookShop.Data.EntityConfiguration
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{
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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using Models;
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internal class BookConfiguration : IEntityTypeConfiguration<Book>
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{
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public void Configure(EntityTypeBuilder<Book> builder)
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{
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builder.HasKey(e => e.BookId);
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builder.Property(e => e.Title)
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.IsRequired()
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.HasMaxLength(50);
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builder.Property(e => e.Description)
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.IsRequired()
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.HasMaxLength(1000);
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builder.Property(e => e.ReleaseDate)
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.IsRequired(false);
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builder.HasOne(e => e.Author)
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.WithMany(a => a.Books)
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.HasForeignKey(e => e.AuthorId);
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}
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}
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}

‎07.Advanced Querying/BookShop.Data/EntityConfiguration/CategoryConfiguration.cs

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namespace BookShop.Data.EntityConfiguration
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{
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using Microsoft.EntityFrameworkCore;
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using Microsoft.EntityFrameworkCore.Metadata.Builders;
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using Models;
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internal class CategoryConfiguration : IEntityTypeConfiguration<Category>
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{
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public void Configure(EntityTypeBuilder<Category> builder)
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{
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builder.HasKey(e => e.CategoryId);
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builder.Property(e => e.Name)
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.IsRequired()
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.HasMaxLength(50);
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}
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}
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}

‎07.Advanced Querying/BookShop.Initializer/BookShop.Initializer.csproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>netcoreapp2.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<ProjectReference Include="..\BookShop.Data\BookShop.Data.csproj" />
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<ProjectReference Include="..\BookShop.Models\BookShop.Models.csproj" />
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</ItemGroup>
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</Project>

‎07.Advanced Querying/BookShop.Initializer/DbInitializer.cs

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namespace BookShop.Initializer
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{
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using System;
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using Data;
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using Models;
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using Generators;
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public class DbInitializer
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{
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public static void ResetDatabase(BookShopContext context)
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{
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context.Database.EnsureDeleted();
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context.Database.EnsureCreated();
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Console.WriteLine("BookShop database created successfully.");
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Seed(context);
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}
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public static void Seed(BookShopContext context)
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{
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Book[] books = BookGenerator.CreateBooks();
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context.Books.AddRange(books);
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context.SaveChanges();
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Console.WriteLine("Sample data inserted successfully.");
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}
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}
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}

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