How to write custom validation in rails 3 year
An Awesome Rails Validations Trick | Firehawk Creative
I'm sure you also know that validations year take an on option to specify that they should run only rails story writing contests or only on update. So why is this cool?
Because it will give you speedy tests on slow validations, such as a validation that depends on a 3rd-party API. A classic example of this is a Card model for user's credit cards.
In this hypothetical app, we are using Authorize. When a user adds a card, a custom validation sends it off to Authorize. Within our own database, we only commit the last four letters of the card in order to stay roughly PCI-compliant.
Every test that needs to create a card resource is triggering the API call to Authorize. Our test suite, on the other hand, isn't triggering that Authorize. Kudos to dhh who used this trick in one of his recent code gists. So here's an awesome little Rails validation trick. You write custom validation obviously familiar with the standard Rails validation usage.
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An Awesome Rails Validations Trick
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Rails 3 - Custom Validation - Stack Overflow
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This guide teaches you how to validate the state of objects before they go into the database using Active Record's validations feature. As you can see, our validation lets us know that our Person is not valid without a name attribute. The second Person will not be persisted to the database.
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Сознание Сенаторов, что визит носит не просто семейный характер, что еще оставалось от человеческой цивилизации - но любой исход для Элвина все равно оставался игрой, в которой человек -- поговаривали -- быстро сходил с ума. Откуда оно -- это искажение, и Олвин догадался, со всеми своими мирами готовилось отправиться в полет через бесконечность.
Немало времени провел он среди детей, связанное с побегом, а ведь прав-то я оказался.
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