@megaorm/cli/dist/commands/RollbackCommand.js

This package allows you to communicate with MegaORM via commands directly from the command line interface (CLI).

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RollbackCommand = void 0;
const GeneratorHandler_1 = require("../handlers/GeneratorHandler");
const builder_1 = require("@megaorm/builder");
const MegaCommand_1 = require("../MegaCommand");
const MegaConfig_1 = require("../MegaConfig");
/**
 * Represents a command to rollback the most recently generated tables.
 *
 * The command performs the following actions:
 * - Resolves the configuration and establishes a connection to the database.
 * - Identifies the last batch of generated tables.
 * - Drops the tables created in the most recent generation batch.
 *
 * Example Behavior:
 * - If the first generation created 2 tables, and the second created 4 tables:
 *   - Executing the rollback will drop the last 4 tables created in the second generation.
 *
 * This ensures that rollbacks only affect the most recent changes, preserving earlier tables.
 *
 * @extends MegaCommand
 */
class RollbackCommand extends MegaCommand_1.MegaCommand {
    /**
     * Executes the rollback command to drop the most recently generated tables.
     *
     * The command identifies the last batch of tables created by the most recent
     * generator files and drops them to revert the changes.
     *
     * @returns A promise that resolves when the tables have been successfully dropped
     * or rejects with an error if the rollback fails.
     */
    static exec() {
        return new Promise((resolve, reject) => {
            MegaConfig_1.MegaConfig.load()
                .then((config) => config.cluster.request(config.default))
                .then((con) => Promise.resolve(new builder_1.MegaBuilder(con)))
                .then((builder) => Promise.resolve(new GeneratorHandler_1.GeneratorHandler(builder)))
                .then((handler) => handler.rollback())
                .then((message) => resolve(this.success(message)))
                .catch(reject);
        });
    }
}
exports.RollbackCommand = RollbackCommand;
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