forked from Automattic/mongoose
/
schematype.js
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/
schematype.js
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/**
* Module dependencies.
*/
var MongooseError = require('./error');
/**
* SchemaType constructor
*
* @param {String} path
* @api public
*/
function SchemaType (path, options) {
this.path = path;
this.validators = [];
this.setters = [];
this.getters = [];
this.options = options;
this._index = null;
for (var i in options)
if (this[i] && 'function' == typeof this[i]){
var opts = Array.isArray(options[i]) ? options[i] : [options[i]];
this[i].apply(this, opts);
}
};
/**
* Base schema. Set by Schema when instantiated.
*
* @api private
*/
SchemaType.prototype.base;
/**
* Sets a default
*
* @param {Object} default value
* @api public
*/
SchemaType.prototype.default = function (val) {
if (arguments.length === 1) {
this.defaultValue = (typeof val === 'function')
? val
: this.cast(val);
return this;
} else if (arguments.length > 1) {
this.defaultValue = [].slice.call(arguments);
}
return this.defaultValue;
};
/**
* Sets index. It can be a boolean or a hash of options
* Example:
* Schema.path('my.path').index(true);
* Schema.path('my.path').index({ unique: true });
*
* "Direction doesn't matter for single key indexes"
* http://www.mongodb.org/display/DOCS/Indexes#Indexes-CompoundKeysIndexes
*
* @param {Object} true/
* @api public
*/
SchemaType.prototype.index = function (index) {
this._index = index;
return this;
};
/**
* Adds an unique index
*
* @param {Boolean}
* @api private
*/
SchemaType.prototype.unique = function (bool) {
this._index = bool ? { unique: true } : null;
return this;
};
/**
* Adds a setter
*
* @param {Function} setter
* @api public
*/
SchemaType.prototype.set = function (fn) {
this.setters.push(fn);
return this;
};
/**
* Adds a getter
*
* @param {Function} getter
* @api public
*/
SchemaType.prototype.get = function (fn) {
this.getters.push(fn);
return this;
};
/**
* Adds a validator
*
* @param {Object} validator
* @param {String} optional error message
* @api public
*/
SchemaType.prototype.validate = function(obj, error){
this.validators.push([obj, error]);
return this;
};
/**
* Adds a required validator
*
* @param {Boolean} enable/disable the validator
* @api public
*/
SchemaType.prototype.required = function(required){
var self = this;
function __checkRequired (v) {
return self.checkRequired(v);
}
if (false === required){
this.isRequired = false;
this.validators = this.validators.filter(function(v){
return v[0].name !== '__checkRequired';
});
} else {
this.isRequired = true;
this.validators.push([__checkRequired, 'required']);
}
return this;
};
/**
* Gets the default value
*
* @param {Object} scope for callback defaults
* @api private
*/
SchemaType.prototype.getDefault = function (scope) {
var ret;
if ('function' == typeof this.defaultValue)
ret = this.defaultValue.call(scope);
else
ret = this.defaultValue;
if (ret !== null && ret !== undefined)
ret = this.cast(ret, scope);
return ret;
};
/**
* Applies setters
*
* @param {Object} value
* @param {Object} scope
* @api private
*/
SchemaType.prototype.applySetters = function (value, scope) {
var v = value
, setters = this.setters
, l = setters.length;
for (var k = l - 1; k >= 0; k--){
v = setters[k].call(scope, v);
if (v === null || v === undefined) return v;
v = this.cast(v, scope);
}
if (!l) {
if (v === null || v === undefined) return v;
v = this.cast(v, scope);
}
return v;
};
/**
* Applies getters to a value
*
* @param {Object} value
* @param {Object} scope
* @api private
*/
SchemaType.prototype.applyGetters = function (value, scope) {
var v = value
, getters = this.getters
, l = getters.length;
for (var k = l - 1; k >= 0; k--){
v = this.getters[k].call(scope, v);
if (v === null || v === undefined) return v;
v = this.cast(v, scope);
}
if (!l) {
if (v === null || v === undefined) return v;
v = this.cast(v, scope);
}
return v;
};
/**
* Performs a validation
*
* @param {Function} callback
* @param {Object} scope
* @api private
*/
SchemaType.prototype.doValidate = function (value, fn, scope) {
var err = false
, path = this.path
, count = this.validators.length;
if (!count) return fn(null);
function validate (val, msg) {
if (err) return;
if (val === undefined || val) {
--count || fn(null);
} else {
fn(new ValidatorError(path, msg));
err = true;
}
}
this.validators.forEach(function (v){
var validator = v[0]
, message = v[1];
if (validator instanceof RegExp)
validate(validator.test(value), message);
else if ('function' == typeof validator)
if (2 == validator.length)
validator.call(scope, value, function(val){
validate(val, message);
})
else
validate(validator.call(scope, value), message);
});
};
/**
* Schema validator error
*
* @param {String} path
* @param {String} msg
* @api private
*/
function ValidatorError (path, msg) {
msg = msg
? '"' + msg + '" '
: '';
MongooseError.call(this, 'Validator ' + msg + 'failed for path ' + path);
Error.captureStackTrace(this, arguments.callee);
this.name = 'ValidatorError';
this.path = path;
};
/**
* Inherits from MongooseError
*/
ValidatorError.prototype.__proto__ = MongooseError.prototype;
/**
* Cast error
*
* @api private
*/
function CastError (type, path, type, value) {
MongooseError.call(this, 'Cast to ' + type + ' failed for value "' + value + '"');
Error.captureStackTrace(this, arguments.callee);
this.name = 'CastError';
this.path = path;
this.type = type;
this.value = value;
};
/**
* Inherits from MongooseError.
*/
CastError.prototype.__proto__ = MongooseError.prototype;
/**
* Module exports.
*/
module.exports = exports = SchemaType;
exports.CastError = CastError;
exports.ValidatorError = ValidatorError;