|įor example, to scaffold only the Artists and Albums tables:ĭotnet ef dbcontext scaffold. If this option is omitted, then all tables and views are included. Tables or views in a specific schema can be included using the 'schema.table' or 'schema.view' format. The -Tables (Visual Studio PMC) or -table (.NET CLI) argument specified the tables and views for which entity types will be generated. If this option is used, then all tables and views in the schemas will be included in the model, even if they are not explicitly included using -Tables or -table. If this argument is omitted, then all schemas are included. The -Schemas (Visual Studio PMC) or -schema (.NET CLI) argument specifies the schemas of tables and views for which entity types will be generated. You can limit which tables and views are scaffolded by specifying schemas and tables. Specifying tables and viewsīy default, all tables and views in the database schema are scaffolded into entity types. The scaffolding process can be controlled by various command line options. For example, for SQL Server or Azure SQL, use. The provider name is typically the same as the provider's NuGet package name. The second argument is the provider name. The -NoOnConfiguring (Visual Studio PMC) or -no-onconfiguring (.NET CLI) option can be passed to suppress creation of the OnConfiguring method containing the connection string. See DbContext Lifetime, Configuration, and Initialization for the various ways that connection strings can be managed. However, as the warning says, connection strings should not exist in production code. This is done so that the generated code does not crash when first used, which would be a very poor learning experience. => optionsBuilder.UseSqlServer("Data Source=(LocalDb)\\MSSQLLocalDB Database=AllTogetherNow") For more guidance on storing connection strings, see. You can avoid scaffolding the connection string by using the Name= syntax to read it from configuration - see. #warning To protect potentially sensitive information in your connection string, you should move it out of source code. For example: protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) For example:Ĭonnection strings in the scaffolded codeīy default, the scaffolder will include the connection string in the scaffolded code, but with a warning. Now the same command that previous used the named connection string from the config file will instead use the connection string stored in User Secrets. For example: dotnet user-secrets set ConnectionStrings:Chinook "Data Source=(localdb)\MSSQLLocalDB Initial Catalog=Chinook" Next, store the connection string in user secrets. This command sets up storage on your computer separate from your source code and adds a key for this storage to the project. Next, initialize User Secrets by executing the following command in the same directory as the ASP.NET Core project: dotnet user-secrets init Instead, connection strings should be stored in a secure way, such as using Azure Key Vault or, when working locally, the Secret Manager tool, aka "User Secrets".įor example, to use the User Secrets, first remove the connection string from your ASP.NET Core configuration file. However, storing connection strings in configuration files is not a good idea, since it is too easy to accidentally expose them, for example, by pushing to source control. Scaffold-DbContext 'Name=ConnectionStrings:Chinook' The following example scaffolds entity types and a DbContext from the Chinook database located on the machine's SQL Server LocalDB instance, making use of the database provider.ĭotnet ef dbcontext scaffold "Name=ConnectionStrings:Chinook" For example, PowerShell requires you to escape the $ character, but not \. How you quote and escape the connection string depends on which shell you are using to execute the command refer to your shell's documentation for more information. The tools will use this connection string to read the database schema. The first argument to the command is a connection string to the database. NET CLI commands have two required arguments: the connection string to the database, and the EF Core database provider to use. Install the NuGet package for the database provider that targets the database schema you want to scaffold from.īoth the PMC and the.Install the NuGet package for in the project you are scaffolding to.NET CLI tools, which across all platforms supported by. Before scaffolding, you'll need to install either the PMC tools, which work on Visual Studio only, or the.These tools provide a graphical tool which builds on top of the EF Core command line tools and offers additional workflow and customization options. If you use Visual Studio, try out the EF Core Power Tools community extension.
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