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Quick Tip: "script/generate scaffold" doesn't create the controller
I ran into a problem when using script/generate scaffold recently. When I tried to use it to build a scaffolded controller for an existing model it would create the model and the directories required for the controller but not generate an actual controller file. There was no error message, and I was returned to the command prompt as if everything was okay. It took me awhile to figure out why it appeared that this generator wasn't working right.
So what was the easy solution? It turns out that my database.yml wasn't setup properly. I was using sqlite (this was just for some proof of concept stuff I was doing locally) and I hadn't actually created the database yet. Generating a scaffold actually does something to the database (I should actually check what, to further my knowledge) and when the database isn't there or the table isn't then it doesn't work.
Doing the same with MySQL actually throws a MySQL error, and trying it again now on my Windows machine at work with sqlite gives the error:
error Before updating scaffolding from new DB schema, try creating a table for your model (Post)
So if your generators don't generate the files that you're expecting, and you don't get any useful error messages then check to make sure your database is working, and that your model tables are actually created!
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28 comments
Comment posted by DannyStaple at 02:47 on 18/06/2007
Another cause (which I found) is where you put the .db file. I put it in the db directory, which seemed logical. It must actually be in the root of the rails instance, or the reference in config/database.yml relative to that root dir.
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