Ruby on Rails 3 Limited Multi-table query and Array Typecasting -

i'm trying show 5 reviews specific category opposed 5 reviews of category. have posted later working comparison purposes.

the reviews have category id index, use category name , compare name category name of reviews want. store 5 reviews extract in array (is efficient way?). reviews , categories 2 separate tables.

currently i'm getting error "can't convert review array". i'm guessing typecasting issue? don't want review become array. want result equivalent old code @review holds 5 reviews. i'm not sure if i'm approaching problem correctly.

current code

   def home     @review = []     idx = 1     review.find_each |review|       break if idx == 5       @category = category.find(review.category_id).category_name       if @category == "something"         @review += review , idx+=1       end     end   end 

old code

def home   @review = review.find(:all, :limit => 5) end 

thanks help!

what happening review contains review object , trying concatenate array, array concatenation works between arrays.

i.e. [1,2,3]+[4] gives [1,2,3,4], [1,2,3]+4 gives error.

you can use << or push instead, or can wrap review object in array:

@reviews << review 

or

@reviews.push review 

or

@reviews += [review] 

...respectively.

---

alternatively, i'm sure there's more idiomatic way trying do.

i'm not sure of rails3 stuff yet, like:

category.where(:category_name => "something").first.reviews.limit(5) 

this assumes association between review , category:

in review model:

class review < activerecord::base   ...   belongs_to :category   ... end 

in category model:

class category < activerecord::base   ...   has_many :reviews   ... end