node-query/lib/drivers/Sqlite.js

70 lines
1.5 KiB
JavaScript

'use strict';
/**
* Driver for Sqlite databases
*
* @module drivers/sqlite
*/
module.exports = (function() {
delete require.cache[require.resolve('../Driver')];
let driver = require('../Driver'),
helpers = require('../helpers');
// Sqlite doesn't have a truncate command
driver.hasTruncate = false;
/**
* SQL to insert a group of rows
* Override default to have better compatibility
*
* @param {String} table - The table to insert to
* @param {Array} [data] - The array of object containing data to insert
* @return {String} - The generated sql statement
*/
driver.insertBatch = function(table, data) {
// Get the data values to insert, so they can
// be parameterized
let sql = '',
vals = [],
cols = [],
fields = [],
first = data.shift(),
params = [],
paramString = '',
paramList = [];
data.forEach(obj => {
let row = [];
Object.keys(obj).forEach(key => {
row.push(obj[key]);
});
vals.push(row);
});
sql += `INSERT INTO ${driver.quoteTable(table)}\n`;
// Get the field names from the keys of the first
// object to be inserted
fields = Object.keys(first);
Object.keys(first).forEach(key => {
cols.push(`'${driver._quote(first[key])}' AS ${driver.quoteIdentifiers(key)}`);
});
sql += `SELECT ${cols.join(', ')}\n`;
vals.forEach(rowValues => {
let quoted = rowValues.map(value => {
return String(value).replace('\'', '\'\'');
});
sql += `UNION ALL SELECT '${quoted.join('\', \'')}'\n`;
});
return {
sql: sql,
values: null,
};
};
return driver;
}());