@fewer/adapter-postgres/lib/migrate.js

A Fewer database adapter to connect to Postgres

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const squel_1 = __importDefault(require("./squel"));
function getTypeName(type) {
    // If there is no config, then we only have the name:
    if (!type.config)
        return type.name;
    switch (type.name) {
        case 'char':
        case 'varchar': {
            const config = type.config;
            if (config.length) {
                return `${type.name}(${config.length})`;
            }
            return type.name;
        }
        case 'numeric':
        case 'decimal': {
            const config = type.config;
            if (config.scale) {
                return `${type.name}(${config.precision}, ${config.scale})`;
            }
            if (config.precision) {
                return `${type.name}(${config.precision})`;
            }
            return type.name;
        }
        case 'array': {
            return `${getTypeName(type.config.subtype)}[]`;
        }
        default:
            return type.name;
    }
}
function createTable(operation) {
    const create = squel_1.default.create(operation.options);
    create.table(operation.name);
    for (const [columnName, columnType] of Object.entries(operation.columns)) {
        const typeName = getTypeName(columnType);
        create.field(columnName, typeName, columnType.config);
    }
    return create.toString();
}
function dropTable(operation) {
    return squel_1.default.dropTable(operation.name).toString();
}
function migrate(migration) {
    const sqls = migration.operations.map(operation => {
        switch (operation.type) {
            case 'createTable':
                return createTable(operation);
            case 'dropTable':
                return dropTable(operation);
            default:
                return null;
        }
    });
    return sqls.filter(Boolean).join('; ');
}
exports.default = migrate;
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