46 lines
1.8 KiB
C#
46 lines
1.8 KiB
C#
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using System.Collections.Immutable;
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using Microsoft.EntityFrameworkCore;
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namespace DeliveryWebApi.Model;
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public class DeliveryDbContext(DbContextOptions<DeliveryDbContext> options) : DbContext(options)
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{
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public DbSet<District> Districts { get; init; }
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public DbSet<Order> Orders { get; init; }
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protected override void OnModelCreating(ModelBuilder modelBuilder)
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{
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modelBuilder.Entity<District>()
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.HasMany(d => d.Orders)
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.WithOne(o => o.District)
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.HasForeignKey(o => o.DistrictId)
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.IsRequired();
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modelBuilder.Entity<District>()
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.HasIndex(d => d.Name)
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.IsUnique();
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// random districts
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var districtNames = new List<string>
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{
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"Viborgskiy", "Primorskiy", "Kalininskiy", "Petrogradskiy", "Center", "Admiralteyskiy", "Vasileostrovskiy",
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"Kirovskiy", "Krasnoselskiy", "Moskovskiy", "Frunzenskiy", "Nevskiy", "Krasnogvardeyskiy", "Kolpinskiy",
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"Pushkinskiy", "Pavlovskiy", "Petrodvortsoviy", "Lomonosovskiy", "Kurortniy", "Kronshtadskiy"
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};
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modelBuilder.Entity<District>()
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.HasData(districtNames.Select((n, i) => new District { Id = i + 1, Name = n }));
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// random orders
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var rnd = new Random();
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var startDate = new DateTime(2020, 1, 1);
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var range = (DateTime.Today - startDate).Days;
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modelBuilder.Entity<Order>()
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.HasData(Enumerable.Range(1, 100).Select(i =>
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{
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var districtId = rnd.Next(0, districtNames.Count) + 1;
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var weight = rnd.NextSingle() * 10 + 0.1f;
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var date = startDate.AddDays(rnd.Next(range));
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return new Order { Id = i, DistrictId = districtId, Weight = weight, DeliveryDate = date };
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}));
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}
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}
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