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AlterTypeDropValueConvertor Class — drizzle-orm Architecture

Architecture documentation for the AlterTypeDropValueConvertor class in sqlgenerator.ts from the drizzle-orm codebase.

Class typescript DrizzleKit

Entity Profile

Dependency Diagram

graph TD
  30c88950_d016_3a7f_aac0_60ee746478c7["AlterTypeDropValueConvertor"]
  fe4174c7_3b9c_5b26_98a0_b2395ca21939["sqlgenerator.ts"]
  30c88950_d016_3a7f_aac0_60ee746478c7 -->|defined in| fe4174c7_3b9c_5b26_98a0_b2395ca21939
  62665fcd_ce9d_389e_6c1b_d64ba46173f1["can()"]
  30c88950_d016_3a7f_aac0_60ee746478c7 -->|method| 62665fcd_ce9d_389e_6c1b_d64ba46173f1
  2d618809_9374_2760_a1b8_aeeeb02ac67c["convert()"]
  30c88950_d016_3a7f_aac0_60ee746478c7 -->|method| 2d618809_9374_2760_a1b8_aeeeb02ac67c

Relationship Graph

Source Code

drizzle-kit/src/sqlgenerator.ts lines 1462–1515

class AlterTypeDropValueConvertor extends Convertor {
	can(statement: JsonDropValueFromEnumStatement): boolean {
		return statement.type === 'alter_type_drop_value';
	}

	convert(st: JsonDropValueFromEnumStatement) {
		const { columnsWithEnum, name, newValues, enumSchema } = st;

		const statements: string[] = [];

		for (const withEnum of columnsWithEnum) {
			const tableNameWithSchema = withEnum.tableSchema
				? `"${withEnum.tableSchema}"."${withEnum.table}"`
				: `"${withEnum.table}"`;

			statements.push(
				`ALTER TABLE ${tableNameWithSchema} ALTER COLUMN "${withEnum.column}" SET DATA TYPE text;`,
			);
			if (withEnum.default) {
				statements.push(
					`ALTER TABLE ${tableNameWithSchema} ALTER COLUMN "${withEnum.column}" SET DEFAULT ${withEnum.default}::text;`,
				);
			}
		}

		statements.push(new DropTypeEnumConvertor().convert({ name: name, schema: enumSchema, type: 'drop_type_enum' }));

		statements.push(new CreateTypeEnumConvertor().convert({
			name: name,
			schema: enumSchema,
			values: newValues,
			type: 'create_type_enum',
		}));

		for (const withEnum of columnsWithEnum) {
			const tableNameWithSchema = withEnum.tableSchema
				? `"${withEnum.tableSchema}"."${withEnum.table}"`
				: `"${withEnum.table}"`;

			const parsedType = parseType(`"${enumSchema}".`, withEnum.columnType);
			if (withEnum.default) {
				statements.push(
					`ALTER TABLE ${tableNameWithSchema} ALTER COLUMN "${withEnum.column}" SET DEFAULT ${withEnum.default}::${parsedType};`,
				);
			}

			statements.push(
				`ALTER TABLE ${tableNameWithSchema} ALTER COLUMN "${withEnum.column}" SET DATA TYPE ${parsedType} USING "${withEnum.column}"::${parsedType};`,
			);
		}

		return statements;
	}
}

Domain

Defined In

Source

Frequently Asked Questions

What is the AlterTypeDropValueConvertor class?
AlterTypeDropValueConvertor is a class in the drizzle-orm codebase, defined in drizzle-kit/src/sqlgenerator.ts.
Where is AlterTypeDropValueConvertor defined?
AlterTypeDropValueConvertor is defined in drizzle-kit/src/sqlgenerator.ts at line 1462.

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