71 lines
2.5 KiB
C#
71 lines
2.5 KiB
C#
using FinlyticNews.Entities;
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using Microsoft.EntityFrameworkCore;
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namespace FinlyticNews.Database;
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/// <summary>
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/// Entity Framework Core database context for the news microservice,
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/// managing article sources, processed news, and matched assets.
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/// </summary>
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public class NewsDbContext : DbContext
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="NewsDbContext"/> class.
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/// </summary>
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/// <param name="options">The context configuration options.</param>
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public NewsDbContext(DbContextOptions<NewsDbContext> options) : base(options)
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{
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}
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/// <summary>
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/// Gets or sets the database set for configured article sources.
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/// </summary>
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public DbSet<ArticleSourceEntity> ArticleSources => Set<ArticleSourceEntity>();
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/// <summary>
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/// Gets or sets the database set for news articles.
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/// </summary>
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public DbSet<NewsArticleEntity> NewsArticles => Set<NewsArticleEntity>();
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/// <summary>
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/// Gets or sets the database set for matched assets.
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/// </summary>
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public DbSet<MatchedAssetEntity> MatchedAssets => Set<MatchedAssetEntity>();
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/// <summary>
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/// Gets or sets the database set for microservice configuration settings.
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/// </summary>
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public DbSet<NewsSettingsEntity> Settings => Set<NewsSettingsEntity>();
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/// <summary>
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/// Configures the model mapping, database constraints, and unique indices.
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/// </summary>
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/// <param name="modelBuilder">The builder being used to construct the database schema model.</param>
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protected override void OnModelCreating(ModelBuilder modelBuilder)
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{
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base.OnModelCreating(modelBuilder);
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// Configure unique index on SourceUrl for deduplication check (idempotency)
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modelBuilder.Entity<NewsArticleEntity>()
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.HasIndex(a => a.SourceUrl)
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.IsUnique();
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// Performance indexes for news queries
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modelBuilder.Entity<NewsArticleEntity>()
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.HasIndex(a => new { a.PublishedAt, a.ScrapedAt });
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modelBuilder.Entity<NewsArticleEntity>()
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.HasIndex(a => a.Status);
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modelBuilder.Entity<MatchedAssetEntity>()
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.HasIndex(m => m.Isin);
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// Configure relationship between NewsArticle and MatchedAssets
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modelBuilder.Entity<MatchedAssetEntity>()
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.HasOne(m => m.NewsArticle)
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.WithMany(a => a.MatchedAssets)
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.HasForeignKey(m => m.NewsArticleId)
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.OnDelete(DeleteBehavior.Cascade);
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}
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}
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