Created
February 18, 2014 20:57
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Validation Mixin for React (http://stackoverflow.com/q/21854938/458193)
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define(function () { | |
'use strict'; | |
var _ = require('underscore'); | |
var ValidationMixin = { | |
getInitialState: function () { | |
return { | |
errors: [] | |
}; | |
}, | |
componentWillMount: function () { | |
this.assertValidatorsDefined(); | |
}, | |
assertValidatorsDefined: function () { | |
if (!this.validators) { | |
throw new Error('ValidatorMixin requires this.validators to be defined on the component.'); | |
} | |
_.each(_.keys(this.validators), function (key) { | |
var validator = this.validators[key]; | |
if (!_.has(this.state, key)) { | |
throw new Error('Key "' + key + '" is defined in this.validators but not present in initial state.'); | |
} | |
if (!_.isFunction(validator)) { | |
throw new Error('Validator for key "' + key + '" is not a function.'); | |
} | |
}, this); | |
}, | |
hasError: function (key) { | |
return _.contains(this.state.errors, key); | |
}, | |
resetError: function (key) { | |
this.setState({ | |
'errors': _.without(this.state.errors, key) | |
}); | |
}, | |
validate: function () { | |
var errors = _.filter(_.keys(this.validators), function (key) { | |
var validator = this.validators[key], | |
value = this.state[key]; | |
return !validator(value); | |
}, this); | |
this.setState({ | |
'errors': errors | |
}); | |
return _.isEmpty(errors); | |
} | |
}; | |
return ValidationMixin; | |
}); |
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