C#-WebApi-EF-CodeFirst-build migration command description

#Environmental requirements

  • Install-Package EntityFrameworkRequired

PS: MYSQL and ORACLE need to install the corresponding database Nuget package

 

#Build migration configuration

Enable-Migrations

parameter list

  • -Auto builds the migration configuration with automatic migrations enabled for the project
  • -ContextTypeName MyContext - Migration directory directory name Projects with multiple contexts build migration configurations
  • -EnableAutomaticMigrations enable automatic migrations

public Configuration() { AutomaticMigrationsEnabled = false; // Whether to enable automatic migration }

 

#Add migration record

Add-Migration migration name

parameter list

  • -IgnoreChanges Builds an empty migration, ignoring any pending changes detected in the current model. This can be used to create an initial, empty migration to enable migrations for existing migrations.
  • -Force existing-migration-name Specifies to rebuild an existing migration.
  • -ProjectName Specifies the project containing the migration configuration type to use. If omitted, the default project selected in the Package Manager Console.
  • -StartUpProjectName Specifies the configuration file to use for naming the connection string. If omitted, the specified project's configuration file will be used.
  • -ConfigurationTypeName Specifies the migration configuration to use. If omitted, migrations will attempt to locate a single migration configuration type item in the target.
  • -ConnectionString Specifies the connection string to use, if omitted the default is used.
  • -ConnectionProviderName Specifies the provider fixed name for the connection string.
  • -AppDomainBaseDirectory Specifies the directory of the application domain in which to run the migration.

 

#Synchronize to database

Update-Database

parameter list

  • -TargetMigration migration name to synchronize the database to the specified migration version
  • -Script Generate script to update database from current state to latest migrations
  • -Script -SourceMigration migrate A -TargetMigration migrate B Migrate named "A" to the specified target named "B"
  • -Script -SourceMigration $InitialDatabase Generate a script that can upgrade a database that is currently at any version to the latest version
  • -TargetMigration $InitialDatabase rolls back any migrations that have been applied to the database
  • -Verbose View the executed SQL statement
  • -SourceMigration specifies the name of a specific migration to use as the starting point for updates
  • -Force specifies to automatically migrate the database
  • -ProjectName specifies the project containing the migration configuration type
  • -StartUpProjectName specifies the configuration file to use for naming the connection string
  • -ConfigurationTypeName specifies the migration configuration to use
  • -ConnectionStringName specifies the configuration file to connect from the application
  • -ConnectionString specifies the connection string to use
  • -ConnectionProviderName Specifies the provider fixed name for the connection string

 

#problems encountered

Problem prompt: enable-migrations failed to build.

Problem report: EF generates synchronous migration error report

Workaround: Regenerate the solution

 

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Origin blog.csdn.net/csdn102347501/article/details/103405868