ActiveRecord::Migration[5.0] is legal ruby grammar?

Question

In this post, I don't understand why ActiveRecord::Migration[5.0] class name doesn't throw a syntax error. Is that a legal ruby grammar? or what hack used with this?

score 3 · Accepted Answer · answered Mar 23 '16 at 13:00

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It's perfectly legal - it calls the class method [] for the ActiveRecord::Migration class. Have a look at the implementation.

answered Mar 23 '16 at 13:00

eugen

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score 2 · Answer 2 · answered Mar 23 '16 at 13:01

2

[] is a class method of the Migration class

Edit @eugen was a bit quicker than me :-)

answered Mar 23 '16 at 13:01

JanC

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Chose @eugen's answer because he is little bit faster. But thank you. :) – Benjamin Mar 23 '16 at 13:29

ActiveRecord::Migration[5.0] is legal ruby grammar?

2 Answers2