blocks|key|1074406|text|我认为你的问题在于你是如何做出反应的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1074407|@customer.responses.create(:offer_id+=>+'1',+:digit+=>+'2')|code-block|syntax|javascript|1074408|你可能想试试这个。|1074409|Response.create(:offer_id+=>+'1',+:digit+=>+'2',+:customer_id+=>+1)|1074410|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I think you problem is how you are creating the response:

<pre><code>@customer.responses.create(:offer_id =&gt; '1', :digit =&gt; '2')
</code></pre>

You might want to try this instead.

<pre><code>Response.create(:offer_id =&gt; '1', :digit =&gt; '2', :customer_id =&gt; 1)
</code></pre>

blocks|key|1074443|text|通常，当这样的东西不起作用时，它表示您缺少了一个has_many关联。如果您希望访问和belongs_to，则需要同时定义它们--belongs_to和has_many。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|1074444|听起来，如果它在您的本地机器上工作，而不是Heroku，那么这将是因为您没有将更改推送到Heroku服务器并在那里重新启动控制台。请确保您已按下更改，然后再试一次。|1074445|entityMap^0|O|8|17|A|1T|A|24|8|16|17|0|0|2A|0^^$0|@$1|2|3|4|5|6|7|K|8|@$9|L|A|M|B|C]|$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|V|8|@$9|W|A|X|B|D]]|E|@]|F|$]]|$1|I|3|-4|5|6|7|Y|8|@]|E|@]|F|$]]]|J|$]]

Usually when something like this doesn't work it indicates you're missing a <code>has_many</code> association. You need to define both the <code>belongs_to</code> and <code>has_many</code> sides of the association if you wish to access them both.

By the sounds of it, if it's working on your local machine but not Heroku then it would be because you haven't pushed the changes to the Heroku server and restarted the console there. Please make sure you have pushed the changes and try again.

blocks|key|18725|text|马可，我想了一下，我有几个猜想让你试试。在进行上述任何一项操作之前，请重新启动应用程序。有时候这会创造奇迹。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|18726|heroku+restart|code-block|syntax|javascript|18727|好吧，现在，试着在控制台里|18728|@customer.responses|18729|那会有什么回报？我想应该是[]吧。也许对此做一些检查等，可以给我们提供一些见解。如果您手动构建和关联一个响应，您能让它显示出来吗？|offset|length|style|CODE|18730|其次，您的无方法错误是在responses上，而不是在create上，所以您在此之后键入的内容可能并不重要，但是，您的offer_id和digit字段是整数吗？如果是的话，尝试使用整数而不是字符串来创建它们。与MySQL或SQLite相比，MySQL是如此脆弱，许多问题可以追溯到我在开发Heroku之前不熟悉Postgre。|18731|@customer.responses.create(:offer_id=>1,:digit=>3)|18732|这可能不重要，但值得一看。|18733|检查的另一件事是所有的回调和验证等等。有什么失败了吗？这似乎与此无关，但我以前也曾遇到过一些问题，因为在我忽略的回调中，似乎出现了微小的无声失败，所以事情变得非常奇怪。我相信您正在进行测试，但是如果您在此模型中的任何地方都有较浅的测试覆盖率，那么不妨利用这个bug搜索来增强它:)|18734|同情的错误，我不知道这些是否会有帮助，但祝好运！如果Heroku的工作人员发现了这个问题，请发帖子，我很有兴趣从中学习！|18735|entityMap^0|0|0|0|0|D|2|0|C|9|R|6|1N|8|1W|5|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|15|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|16|8|@$M|17|N|18|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|19|8|@$M|1A|N|1B|O|P]|$M|1C|N|1D|O|P]|$M|1E|N|1F|O|P]|$M|1G|N|1H|O|P]]|9|@]|A|$]]|$1|S|3|T|5|D|7|1I|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|1J|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1K|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|6|7|1L|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|11|$]]

Marco, I thought about this a bit, and I have a few guesses for you to try. Before you do either of these, restart your app. Sometimes that does miracles.

<pre><code>heroku restart
</code></pre>

Ok, now, try in console just 

<pre><code>@customer.responses
</code></pre>

What does that return? I assume it should be <code>[]</code>. Maybe doing some inspection etc. of that can give us insights here. If you build and associate a response manually can you get it to show up?

Second, your no method error is on <code>responses</code>, not on <code>create</code>, so whatever you type after that probably doesn't matter, BUT, are your <code>offer_id</code> and <code>digit</code> fields integers? If so, try creating them using integers, not strings. PostgreSQL is so fragile compared to MySQL or SQLite, I've had loads of issues that trace back to my unfamiliarity working with Postgre prior to developing on Heroku.

<pre><code>@customer.responses.create(:offer_id=&gt;1,:digit=&gt;3)
</code></pre>

That probably doesn't matter but it's worth checking out.

The other thing to check is all your callbacks and validations etc. Is anything failing? It may not seem related but I've had issues before where things acted very weird because of seemingly tiny silent failures in a callback that I had overlooked. I'm sure you're testing as you go, but if you've got shallow test coverage anywhere on this model you might as well use this bug hunt as a chance to beef it up :)

Sympathies on the error, I don't know if any of this will help, but good luck! Please post if Heroku staff find the issue, I'd be very interested to learn from it!

Why would I get NoMethodError on my Heroku app when the same code works flawlessly on my local setup?

The error is triggered by this code:

<pre><code>@customer = Customer.find(1)
@customer.responses.create(:offer_id =&gt; '1', :digit =&gt; '2')
</code></pre>

That code works as intended on my local server and in my local Rails console.

However, on Heroku the above code triggers NoMethodError:

<pre><code>NoMethodError (undefined method `responses' for #&lt;Customer:0x7f7bcbee3808&gt;):
</code></pre>

The Response model is tied to the Customer model by means of belongs_to :customer

Additionally, I can login to the Heroku console and run this without any problems:

<pre><code>Response.create(:offer_id =&gt; '1', :customer_id =&gt; '1', :digit =&gt; '2')
</code></pre>

So if the above works and both versions work fine on my local box, why would the association fail on Heroku?

--

Running Rails 3.0.6 and tested on Heroku Ruby 1.8.7 and Ruby 1.9.2

Databases are identical on Heroku and on my local box.

Rails association fails on Heroku but works on local box?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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为什么我要在我的Heroku应用程序上安装NoMethodError，因为相同的代码在我的本地设置上运行得完美无缺？该错误由以下代码触发：@customer = Customer.find(1)@customer.responses.create(:offer_id => '1', :digit => '2')该代码在...

问Rails协会在Heroku上失败，但在本地框上工作？
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