在 Rails 中，除了验证错误之外，如何找出导致 .save() 失败的原因? [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 模型，它从 valid? 返回 true(并且 .errors 为空)，但是从 false 返回false代码>保存().如果模型实例有效，我如何找出导致保存失败的原因?

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

检查所有回调.

我遇到了这样的问题，我有一个after_validate"方法在我对模型进行了一系列更改后失败了.该模型是有效的，但after_validate"返回 false，所以如果我使用 model.valid 它说是真的，但是如果我保存它会给我验证错误(从 after_validate 回调传递).很奇怪.

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.

查看应用程序跟踪，您应该能够看到哪行代码引发了异常.

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

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