Array validations

[Frank]

Hey!

Started up with Grape today and am looking to enable a user to POST a request for an order which contains a variable number of line items. Was wondering your suggestions on the cleanest way to handle this, as I'm not sure exactly how to handle the validations.

Was thinking something along the lines of:

params do

   group :line_item do

          requires :item_id

          requires :quantity

   end

end

Where the user could include multiple line items, but will Grape check each of them for the required fields?

[Daniel Doubrovkine]

You should try it. If it doesn't work, I think we should support validation across an array of items. You might also want to just use model-level validations and wrap the creating of line items in a transaction, so if the N-th one fails because, say, quantity is missing, you get a standard validation exception, everything is rolled back, etc.

Finally, personally I would think twice before implementing something like this. I would create a single item POST and make 10 calls if I have to. These days having made all possible mistakes in API design one could have possibly make, I would model any new API on some good examples. What does Github do in similar scenarios?

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