Mysql::Error: Specified key was too long; max key length is 767 bytes: CREATE INDEX

Question

I\'m working with rails 2.3.5 application, in witch I have this field

t.string   \"trip_cities\",             :limit => 256

And this ind

Answer 1

Set a limit on the length of the string to 191 characters, example:

t.string :project, index: { unique: true }, limit: 191

OR

Use this patch: https://github.com/rails/rails/issues/9855#issuecomment-390366184