Hi,
I'm new to Rails and already did some stuff with ActiveRecord
associations but I cannot do one thing:
I've got a
===
class Paragraph < ActiveRecord::Base
end
===
And I want each Paragraph to contain a list of words (each word is
simply a String). I want to have a table with all Paragraphs and save/
load them. And finally get a json rep of a paragraph. Simple. If I do
===
class Paragraph < ActiveRecord::Base
has_many :words
end
class Word < ActiveRecord::Base
belongs_to :paragraph
end
# and put corresponding stuff in the db schema
create_table "words", :force => true do |t|
t.integer "paragraph_id"
t.string "content"
end
===
So, this would work, and a json rep of a paragraph would look like
(stripped some stuff for clarity)
===
{"words": [{"content" : "Once"}, {"content" : "upon"}, {"content" :
"a"}, {"content" : "time"}]}
===
but I don't want this extra complexity so I want to get something like
===
{"words": ["Once", "upon", "a", "time"]}
===
A plain array of strings without the extra nesting.
But I can't do
===
class Paragraph < ActiveRecord::Base
has_many :words, :class_name => "String"
end
# without the Word class at all
===
I could add some additional to_json parameters I guess and tweak it to
give me what I want but it'd be ugly.
How do I achieve this with ActiveRecord? I guess a paragraphs_words
join table would work but I can't work out the details.
Thanks,
Martin
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