Comparison

Code Length Comparison

Aspect	Native TypeORM	typeorm-fluent-migrator
Code Length	Verbose, manual new Table()	Concise, 50-70% reduction
Readability	Deep nesting, scattered properties	Linear, reads like English
Type Safety	Runtime errors possible	Compile-time checks
IDE Support	Limited autocomplete	Full IntelliSense
Maintainability	High cognitive load	Low, structured clearly

Example Comparison

Native TypeORM

await queryRunner.createTable(
    new Table({
        name: 'users',
        columns: [
            {
                name: 'id',
                type: 'int',
                isPrimary: true,
                isGenerated: true,
                generationStrategy: 'increment',
            },
            {
                name: 'name',
                type: 'varchar',
                length: '255',
                isNullable: false,
            },
            {
                name: 'email',
                type: 'varchar',
                length: '255',
                isUnique: true,
                isNullable: false,
            },
        ],
    }),
    true
);

typeorm-fluent-migrator

await FL.use(queryRunner)
    .create.table('users')
    .column('id').int.primary.autoIncrement
    .column('name').varchar(255).notNull
    .column('email').varchar(255).unique.notNull
    .execute();

Advantages

1. Less Code

Native TypeORM requires creating a Table object and configuring all properties, while fluent-migrator uses chainable methods, making the code more concise.

2. Better Readability

Chainable methods make the code read like natural language, making it easier to understand.

3. Type Safety

Full TypeScript support means errors are caught at compile time.

4. Better IDE Support

IntelliSense autocomplete makes writing migrations much easier.

5. Easier Maintenance

Clear structure makes modifications and extensions easier.