Referencing a field in a Fabrication

Question

In the below example I would like abbr to just be the first 3 letters of name but I get a >> undefined local variable name... I guess because name goes out of scope in the {} block?

Fabricator(:team) do
  name { Faker::Name.first_name }
  abbr { Faker::Name.first_name[0..2] }
  league { Fabricate(:league) }  
end

How can I make abbr just the first three letters of name?

i.e. this throws the error

Fabricator(:team) do
  name { Faker::Name.first_name }
  abbr { name[0..2] }  \\ error name is undefined here
  league { Fabricate(:league) }  
end

Just show the output of `Team.column_names` from your rails console. Just to make sure if you have the `name` attribute in your `Team` model. — Arup Rakshit, Mar 01 '15 at 18:15
Try `abbr { Fabricate.attributes_for(:team)[:name][0..2] }` and let me know if it works for you.. — Arup Rakshit, Mar 01 '15 at 18:36
Failure/Error: Unable to find matching line from backtrace SystemStackError: stack level too deep — slindsey3000, Mar 01 '15 at 18:57

score 6 · Accepted Answer · answered Mar 02 '15 at 00:28

You can also do it by accepting the attributes hash in the abbr value block.

Fabricator(:team) do
  name { Faker::Name.first_name }
  abbr { |attrs| attrs[:name][0..2] }
  league
end

Unrelated, but league will automatically expand to what you had specified above if you write it like this.

SteveTurczyn · Answer 2 · 2015-03-01T19:15:40.933

3

You should be able to do a before_save callback...

Fabricator(:team) do
  before_save {|team| team.abbr ||= team.name[0..2] }
  name { Faker::Name.first_name }
  league { Fabricate(:league) }  
end

Edited to make optional if value for abbr is passed.

edited Mar 01 '15 at 19:15

answered Mar 01 '15 at 18:56

SteveTurczyn

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Does this prevent me however from passing an "abbr" when I am fabricating though? – slindsey3000 Mar 01 '15 at 19:10
This will no matter what set team.abbr ... if I have passed a value in for "abbr" it will get overridden at save? – slindsey3000 Mar 01 '15 at 19:11
1

Yes it will override a passed variable but you can fix that with `team.abbr ||= team.name[0..2]` – SteveTurczyn Mar 01 '15 at 19:14

Referencing a field in a Fabrication

2 Answers2