在Rails，我怎么能找出导致一个.save（）失败，不是验证错误等？ [英] In rails, how can I find out what caused a .save() to fail, other than validation errors?

问题描述

我有一个ActiveRecord的模式，将返回真从是否有效？（和.errors是空的），但在返回假从保存（）。如果该模型实例是有效的，我怎么能找出什么导致保存失败？

I have an ActiveRecord model which is returning true from valid? (and .errors is empty), but is returning false from save(). If the model instance is valid, how can I find out what's causing the save to fail?

推荐答案

检查所有的回调。

我有这样一个问题，我已经和after_validate方法是失败后，我做了一堆改变模式。该模型是有效的，但after_validate返航假的，所以如果我用 model.valid 它说真的，但如果我救它给了我验证错误（通过传递从after_validate回调）。这是不可思议。

I had a problem like this where I had and "after_validate" method that was failing after I had made a bunch of changes to the model. The model was valid but the "after_validate" was returning false, so if I used model.valid it said true, but then if I saved it gave me validation errors (passed through from the after_validate callback). It was weird.

查看应用程序的跟踪，你应该能够看到一行code为提高例外。

Look at the application trace and you should be able to see what line of code is raising the exception.

这篇关于在Rails，我怎么能找出导致一个.save（）失败，不是验证错误等？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！