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query.js
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query.js
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var config = require('./config');
var migrationTable = require('./migrationTable');
function run_query(conn, query, cb, run) {
if (run == null) {
run = true;
}
if (run) {
conn.getConnection(function (err, connection) {
if (err) {
config.logger.error(`${err}`);
throw err;
}
config.logger.debug(query);
connection.query(query, function (error, results, fields) {
connection.release();
if (error) {
config.logger.error(`${error}`);
throw error;
}
cb(results);
});
});
} else {
cb({});
}
}
function execute_query(conn, path, final_file_paths, type, cb, run = true) {
if (run == null) {
run = true;
}
const TYPE_NAME = type.toUpperCase();
if (final_file_paths.length) {
var file_name = final_file_paths.shift()['file_path'];
var current_file_path = path + "/" + file_name;
const execution = run ? 'Run Query' : 'Timestamp Only';
var queries = require(current_file_path);
config.logger.info(`${execution} ${TYPE_NAME}: ${file_name}`);
var timestamp_val = file_name.split("_", 1)[0];
if (typeof (queries[type]) == 'string') {
run_query(conn, queries[type], function (res) {
updateRecords(conn, type, timestamp_val, function () {
execute_query(conn, path, final_file_paths, type, cb, run);
});
}, run);
} else if (typeof (queries[type]) == 'function') {
config.logger.debug(`Function: ${queries[type].toString()}`);
if (run) {
queries[type](conn, function () {
updateRecords(conn, type, timestamp_val, function () {
execute_query(conn, path, final_file_paths, type, cb, run);
});
});
} else {
updateRecords(conn, type, timestamp_val, function () {
execute_query(conn, path, final_file_paths, type, cb, run);
});
}
}
} else {
config.logger.info(`No more ${TYPE_NAME} migrations to run`);
cb();
}
}
function updateRecords(conn, type, timestamp_val, cb) {
var query = '';
if (type == 'up') {
query = migrationTable.insertOne(timestamp_val);
} else if (type == 'down') {
query = migrationTable.deleteOne(timestamp_val);
}
run_query(conn, query, function (res) {
cb();
});
}
module.exports = {
run_query: run_query,
execute_query: execute_query,
updateRecords: updateRecords
};