Create Tables on runtime in EF Core

问题:

I know I can use the following command to add a new migration and create the database :

dotnet ef migrations add MigrationName -c DbContextName dotnet ef database update -c DbContextName 

but I need to create my database/tables on runtime.

First I tried to do that by overriding OnModelCreating but I failed. It returned me an error pointing out that the tables have not been created

Here is my dbcontext class

public class AimeLoggerContext : DbContext     {          public AimeLoggerContext(DbContextOptions<AimeLoggerContext> options)             : base(options)         {              Database.Migrate();         }          protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)         {             base.OnConfiguring(optionsBuilder);         }          protected override void OnModelCreating(ModelBuilder modelBuilder)         {              modelBuilder.Entity("Aime.Logger.Loggers.Database.Model.Log", b =>             {                 b.Property<int>("Id")                   .ValueGeneratedOnAdd();                 b.Property<DateTime>("Datetime");                 b.HasKey("Id");                 b.ToTable("Logs");              });              base.OnModelCreating(modelBuilder);          }          public DbSet<Log> Logs { get; set; }       } 

Any Idea ?

回答1:

If you need to create you model tables also if in your DB there are some other tables you can use

RelationalDatabaseCreator databaseCreator =      (RelationalDatabaseCreator) context.Database.GetService<IDatabaseCreator>(); databaseCreator.CreateTables(); 

回答2:

Instead of DbContext.Database.Migrate() I should use DbContext.Database.EnsureCreated() method.

文章来源: Create Tables on runtime in EF Core