payload/dist/database/migrations/getPredefinedMigration.js

Node, React, Headless CMS and Application Framework built on Next.js

import fs from 'fs';
import path from 'path';
import { pathToFileURL } from 'url';
/**
 * Get predefined migration 'up', 'down' and 'imports'
 */ export const getPredefinedMigration = async ({ dirname, file, migrationName: migrationNameArg, payload })=>{
    // Check for predefined migration.
    // Either passed in via --file or prefixed with '@payloadcms/db-mongodb/' for example
    const importPath = file ?? migrationNameArg;
    if (importPath?.startsWith('@payloadcms/db-')) {
        // removes the package name from the migrationName.
        const migrationName = importPath.split('/').slice(2).join('/');
        let cleanPath = path.join(dirname, `./predefinedMigrations/${migrationName}`);
        if (fs.existsSync(`${cleanPath}.mjs`)) {
            cleanPath = `${cleanPath}.mjs`;
        } else if (fs.existsSync(`${cleanPath}.js`)) {
            cleanPath = `${cleanPath}.js`;
        } else {
            payload.logger.error({
                msg: `Canned migration ${migrationName} not found.`
            });
            process.exit(1);
        }
        cleanPath = cleanPath.replaceAll('\\', '/');
        const moduleURL = pathToFileURL(cleanPath);
        try {
            const { downSQL, imports, upSQL } = await eval(`import('${moduleURL.href}')`);
            return {
                downSQL,
                imports,
                upSQL
            };
        } catch (err) {
            payload.logger.error({
                err,
                msg: `Error loading predefined migration ${migrationName}`
            });
            process.exit(1);
        }
    } else if (importPath) {
        try {
            const { downSQL, imports, upSQL } = await eval(`import('${importPath}')`);
            return {
                downSQL,
                imports,
                upSQL
            };
        } catch (_err) {
            if (importPath?.includes('/')) {
                // We can assume that the intent was to import a file, thus we throw an error.
                throw new Error(`Error importing migration file from ${importPath}`);
            }
            // Silently fail. If the migration cannot be imported, it will be created as a blank migration and the import path will be used as the migration name.
            return {};
        }
    }
    return {};
};

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