@itrocks/mysql-maintainer/esm/contextual-connection.js

Reactively maintains database structure by updating schema and retrying on MySQL errors

import { SqlError } from 'mariadb';
import { MysqlMaintainer } from './mysql-maintainer';
export class Contextual {
    context = [];
    superQuery = () => new Promise(() => { });
    async applyTo(connection) {
        connection.context = [];
        connection.superQuery = connection.query;
        connection.query = Contextual.prototype.query;
        return connection;
    }
    async query(sql, values) {
        try {
            return await this.superQuery(sql, values);
        }
        catch (error) {
            if (!(error instanceof SqlError)
                || !error.code
                || !['ER_BAD_FIELD_ERROR'].includes(error.code)) {
                throw error;
            }
            // @ts-ignore query applies to a Connection
            if (await new MysqlMaintainer(this).manageError(error, this.context[this.context.length - 1], sql, values)) {
                return this.query(sql, values);
            }
            throw error;
        }
    }
}
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