[RUBY] The story that I struggled because I couldn't do "Rails db: migrate".

At one point, when I tried rails db: migrate, StandardError: An error has occurred, all later migrations canceled: An error has occurred.

First rake db: reset and then Trying to solve it by rails db: migrate again,

I get an error and can't even rake db: reset.

Check here if there are any mistakes in the migration file.

However, no matter how many times I checked, there was no spelling mistake.

I searched quite a bit. And at one point

** "Oh, full-width characters are included." **

Yes, it's a solution.

When I couldn't rails db: migrate, I had a misspelling or double-byte characters. I have a lot of things like that.

It's a simple matter, but this time it took some time to investigate the cause.

I think that beginners, including myself, often have trouble with migration files. rails At the beginning of the beginning I accidentally deleted the migration file, or corrected it without rolling back ... It's scary.

"You have to be careful when handling migration files" I realized again that.

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