Aranasoft.Cobweb.FluentMigrator.Extensions 3.1.0

An alternative fluent interface for FluentMigrator.

Cobweb was created by Arana Software, a software agency in Las Vegas, Nevada.

Alternate Syntax for FluentMigrator

Aranasoft.Cobweb.FluentMigrator.Extensions provides an alternate syntax style for FluentMigrator, a database migration framework for .NET, using lambda expression syntax instead of method chains.

FluentMigrator's Method Chain Syntax

FluentMigrator employes a series of chained expression to build database schema.

Create.Table("TestTable")
      .WithColumn("FirstColumn").AsString().Nullable().WithDefaultValue("test")
      .WithColumn("SecondColumn").AsString().NotNullable().WithDefaultValue("sample");

Though this style is effective, some may find the syntax confusing, as there is no clear delineation between setting column properties and transitioning additional columns. Because this grouping can only be resolved through the context of method names, it is also impossible for code-formatting tools to organize and group applicable code.

Cobweb's Lambda Expression Syntax

Cobweb uses lambda expressions to define column properties.

Create.Table("TestTable")
      .WithColumn("FirstColumn", col => col.AsString().Nullable().WithDefaultValue("test"))
      .WithColumn("SecondColumn, col => col.AsString().NotNullable().WithDefaultValue("sample"));

Under the covers, Cobweb passes these lambda expressions to FluentMigrator's method chains. The lambda syntax will naturally group column properties and delineate from other columns. This grouping also enables code formating support from editor tooling.

Usage

Create Table: WithColumn

Syntax: WithColumn(string columnName, Func columnOptions)

Create.Table("TestTable")
      .WithColumn("FirstColumn", col => col.AsString().Nullable())
      .WithColumn("SecondColumn, col => col.AsString().NotNullable().WithDefaultValue("sample"));

Alter Table: AddColumn

Syntax: AddColumn(string columnName, Func columnOptions)

Alter.Table("TestTable")
     .AddColumn("FirstColumn", col => col.AsInt32().Nullable())
     .AddColumn("SecondColumn", col => col.AsInt32().NotNullable().WithDefaultValue(5)));

Alter Table: AlterColumn

Syntax: AlterColumn(string columnName, Func columnOptions)

Alter.Table("TestTable")
     .AlterColumn("FirstExistingColumn", col => col.AsInt32())
     .AlterColumn("SecondExistingColumn", col => col.AsInt32().NotNullable().WithDefaultValue(5)));

Create Index: OnColumn

Syntax: OnColumn(string columnName, Func columnOptions)

Create.Index("TestIndex")
     .OnColumn("FirstColumn", col => col.Ascending())
     .OnColumn("SecondColumn", col => col.Descending());

Release Notes: 3.1.0 (2019-12-10)

Code Refactoring

• namespaces: revise namespaces to Aranasoft.Cobweb (56aa10b)

BREAKING CHANGES

• namespaces: the root namespace has been changed from Cobweb to Aranasoft.Cobweb. For example, the MigrationExtensions class is now located within Aranasoft.Cobweb.FluentMigrator.Extensions. (56aa10b)