machinomy/lib/storage/sqlite/migrations/util/removeColumn.js

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function removeColumn(db, tableName, columnName, cb) {
    db.all(`PRAGMA table_info(${tableName});`, async (err, rows) => {
        if (err) {
            cb(err, null);
        }
        else {
            try {
                const sqlNamesWithTypes = rows.filter(row => row.name !== columnName)
                    .map(row => `${row.name} ${row.type}`)
                    .join(', ');
                const sqlNames = rows.filter(row => row.name !== columnName)
                    .map(row => row.name)
                    .join(', ');
                const removeColumnSql = `
        CREATE TEMPORARY TABLE ${tableName + '_backup'}(${sqlNamesWithTypes});
        INSERT INTO ${tableName + '_backup'} SELECT ${sqlNames} FROM ${tableName};
        DROP TABLE ${tableName};
        CREATE TABLE ${tableName}(${sqlNamesWithTypes});
        INSERT INTO ${tableName} SELECT ${sqlNames} FROM ${tableName + '_backup'};
        DROP TABLE ${tableName + '_backup'};
       `;
                db.runSql(removeColumnSql);
                cb(null, null);
            }
            catch (e) {
                cb(e, null);
            }
        }
    });
}
exports.default = removeColumn;
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