query.js
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var Utils = require("../../utils")
module.exports = (function() {
var Query = function(database, callee, options) {
this.database = database
this.callee = callee
this.options = Utils._.extend({
logging: console.log,
plain: false,
raw: false
}, options || {})
}
Utils._.extend(Query.prototype, require("../query").prototype)
Query.prototype.run = function(sql) {
var self = this
this.sql = sql
if(this.options.logging !== false)
this.options.logging('Executing: ' + this.sql)
var columnTypes = {};
this.database.serialize(function() {
var executeSql = function() {
self.database[databaseMethod](self.sql, function(err, results) {
//allow clients to listen to sql to do their own logging or whatnot
self.emit('sql', self.sql)
this.columnTypes = columnTypes;
err ? onFailure.call(self, err) : onSuccess.call(self, results, this)
})
};
var isInsertCommand = (self.sql.toLowerCase().indexOf('insert') == 0)
, isUpdateCommand = (self.sql.toLowerCase().indexOf('update') == 0)
, databaseMethod = (isInsertCommand || isUpdateCommand) ? 'run' : 'all'
if (databaseMethod === 'all' && /select\s.*?\sfrom\s+([^ ;]+)/i.test(self.sql)) {
var tableName = RegExp.$1;
if (tableName !== 'sqlite_master') {
// get the column types
self.database.all("PRAGMA table_info(" + tableName + ")", function(err, results) {
if (!err) {
for (var i=0, l=results.length; i<l; i++) {
columnTypes[results[i].name] = results[i].type;
}
}
executeSql();
});
} else {
executeSql();
}
} else {
executeSql();
}
})
return this
}
//private
var onSuccess = function(results, metaData) {
var result = this.callee
, self = this
// add the inserted row id to the instance
if (this.callee && (this.sql.indexOf('INSERT INTO') == 0) && metaData.hasOwnProperty('lastID')) {
var autoIncrementField = this.callee.__factory.autoIncrementField
this.callee[autoIncrementField] = metaData.lastID
}
if (this.sql.indexOf('sqlite_master') != -1) {
result = results.map(function(resultSet){ return resultSet.name })
} else if (this.sql.indexOf('SELECT') == 0) {
// transform results into real model instances
// return the first real model instance if options.plain is set (e.g. Model.find)
if(this.options.raw) {
result = results
} else {
result = results.map(function(result) {
for (var name in result) {
if (metaData.columnTypes[name] === 'DATETIME') {
result[name] = new Date(result[name]);
}
}
return self.callee.build(result, { isNewRecord: false })
})
}
if(this.options.plain)
result = (result.length == 0) ? null : result[0]
} else if((this.sql.indexOf('SHOW') == 0) || (this.sql.indexOf('DESCRIBE') == 0))
result = results
this.emit('success', result)
}
var onFailure = function(err) {
this.emit('failure', err, this.callee)
}
return Query
})()