Helper.js
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exports.Helper = function(Sequelize) {
var Helper = {
log: function(obj) {
var sys = require("sys")
sys.puts(sys.inspect(obj))
},
evaluateTemplate: function(template, replacements) {
var result = template
Helper.Hash.keys(replacements).forEach(function(key) {
result = result.replace("%{" + key + "}", replacements[key])
})
return result
},
SQL: {
manyToManyTableName: function(t1, t2) {
return [t1.tableName, t2.tableName].sort().join("")
},
asTableIdentifier: function(name) {
return Helper.Inflection.singularize(name.toLowerCase()) + "Id"
},
addPrefix: function(prefix, string) {
return prefix + string[0].toUpperCase() + string.replace(/^./, "")
},
asTableName: function(name) {
return Helper.Inflection.pluralize(name)
},
asSqlDate: function(date) {
return [
[
date.getFullYear(),
((date.getMonth() < 9 ? '0' : '') + (date.getMonth()+1)),
((date.getDate() < 10 ? '0' : '') + date.getDate())
].join("-"),
date.toLocaleTimeString()
].join(" ")
},
valuesForInsertQuery: function(object) {
var actualValues = object.values,
result = []
Helper.Hash.forEach(actualValues, function(value, key) {
var dataType = object.table.attributes[key]
result.push(Helper.SQL.transformValueByDataType(value, dataType))
})
return result
},
valuesForUpdate: function(object, options) {
var actualValues = object.values,
result = []
options = options || {}
Helper.Hash.forEach(actualValues, function(value, key) {
var dataType = object.table.attributes[key]
result.push([key, Helper.SQL.transformValueByDataType(value, dataType)].join(" = "))
})
return result.join(options.seperator || ", ")
},
fieldsForInsertQuery: function(object) {
return Helper.Hash.keys(object.values).join(", ")
},
transformValueByDataType: function(value, dataType) {
if((value == null)||(typeof value == 'undefined')||((dataType.indexOf(Sequelize.INTEGER) > -1) && isNaN(value)))
return "NULL"
if(dataType.indexOf(Sequelize.FLOAT) > -1)
return (typeof value == 'number') ? value : parseFloat(value.replace(",", "."))
if(dataType.indexOf(Sequelize.BOOLEAN) > -1)
return (value === true ? 1 : 0)
if(dataType.indexOf(Sequelize.INTEGER) > -1)
return value
if(dataType.indexOf(Sequelize.DATE) > -1)
return ("'" + Helper.SQL.asSqlDate(value) + "'")
return ("'" + value + "'")
},
hashToWhereConditions: function(conditions, attributes) {
if(typeof conditions == 'number')
return ('id = ' + conditions)
else {
var result = []
Helper.Hash.forEach(conditions, function(value, key) {
var _value = Helper.SQL.transformValueByDataType(value, attributes[key])
if(_value == 'NULL') result.push(key + " IS NULL")
else result.push(key + "=" + _value)
})
return result.join(" AND ")
}
}
},
Hash: {
forEach: function(object, func) {
Helper.Hash.keys(object).forEach(function(key) {
func(object[key], key, object)
})
},
map: function(object, func) {
var result = []
Helper.Hash.forEach(object, function(value, key, object) {
result.push(func(value, key, object))
})
return result
},
keys: function(object) {
var results = []
for (var property in object)
results.push(property)
return results
},
values: function(object) {
var result = []
Helper.Hash.keys(object).forEach(function(key) {
result.push(object[key])
})
return result
},
merge: function(source, target, force) {
Helper.Hash.forEach(source, function(value, key) {
if(!target[key] || force)
target[key] = value
})
return target
}
},
Array: {
map: function(array, func) {
var result = []
array.forEach(function(element) {
result.push(func(element))
})
return result
},
reject: function(array, func) {
var result = []
array.forEach(function(element) {
if(!func(element)) result.push(element)
})
return result
},
select: function(array, func) {
var result = []
array.forEach(function(element) {
if(func(element)) result.push(element)
})
return result
},
without: function(array, withouts) {
var result = []
array.forEach(function(e) {
if(withouts.indexOf(e) == -1) result.push(e)
})
return result
},
join: function(arr1, arr2) {
var result = []
arr1.forEach(function(e) { result.push(e) })
arr2.forEach(function(e) { result.push(e) })
return result
}
},
Inflection: require(__dirname + "/../lib/inflection/inflection")
}
return Helper
}