未定义的方法“to_sym”对于 db:auto:migrate 期间的 nil:NilClass
我试图在我的系统中运行 db:auto:migrate ,每当它到达使用日期类型的列时,它就会不断抛出 nil:NilClass 的未定义方法“to_sym”。如果我将字段更改为日期时间并运行迁移,它将将该字段更改为没有错误的日期。是什么导致了这个问题。每次我想运行迁移时,我都必须不断更改字段类型。
我使用日期类型而不是日期时间的原因是因为我试图输出日期,而 Rails 不断调整我的时区的数据,这会给出错误的数据。
谢谢。
乔什
I'm trying to run a db:auto:migrate in my system and it keep throwing the undefined method `to_sym' for nil:NilClass whenever it gets to a column that uses a type of date. If I change the field to a datetime and run the migrate, it will change the field to a date with no errors. What is causing this problem. I have to keep changing the field type every time I want to run my migration.
The reason I'm using the date type instead of the datetime is because I am trying to output the date and Rails keeps adjusting the data for my time zone, which is giving out bad data.
Thank you.
Josh
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这是因为您错误地命名了列,并且以某种方式生成了 sql 表。我现在正试图解决这个问题。这种情况以前发生过,我只是重建了桌子。
例如,您可能将整数拼写为 integre,这会搞乱一切。无论如何,这就是我所做的。
This is because you named a column wrong and somehow the sql table got generated. I trying to get this fixed right now. This has happened before and I just rebuild the table.
For example, you might have spelled integer as integre and that messes up everything. That is what I did anyways.