How to specify multiple values in where with AR query interface in rails3

Question

Per section 2.2 of rails guide on Active Record query interface here:

which seems to indicate that I can pass a string specifying the condition(s), then an array of

Answer 1

Sounds like you're doing something like this:

Model.where("attribute = ? OR attribute2 = ?", [value, value])

Whereas you need to do this:

#notice the lack of an array as the last argument
Model.where("attribute = ? OR attribute2 = ?", value, value) Have a

look at http://guides.rubyonrails.org/active_record_querying.html#array-conditions for more details on how this works.

Was really close. You can turn an array into a list of arguments with *my_list.

Model.where("id = ? OR id = ?", *["1", "2"])

OR

params = ["1", "2"]
Model.where("id = ? OR id = ?", *params)

Should work

Answer 2

WRONG This is what I used to do for some reason.

keys = params[:search].split(',').map!(&:downcase)
# keys are now ['brooklyn', 'queens']

query = 'lower(city) LIKE ?'

if keys.size > 1
  # I need something like this depending on number of keys 
  # 'lower(city) LIKE ? OR lower(city) LIKE ? OR lower(city) LIKE ?'
 query_array = []
 keys.size.times { query_array << query }
 #['lower(city) LIKE ?','lower(city) LIKE ?']
 query = query_array.join(' OR ')
 # which gives me 'lower(city) LIKE ? OR lower(city) LIKE ?'
end
# now I can query my model
# if keys size is one then keys are just 'brooklyn', 
# in this case it is  'brooklyn', 'queens'
# @posts = Post.where('lower(city) LIKE ? OR lower(city) LIKE ?','brooklyn', 'queens' )
@posts = Post.where(query, *keys )

now however - yes - it's very simple. as nfriend21 mentioned

Model.where(attribute: [value1,value2])

does the same thing

Answer 3

You can use a hash rather than a string. Build up a hash with however many conditions and corresponding values you are going to have and put it into the first argument of the where method.

Answer 4

This is actually pretty simple:

Model.where(attribute: [value1,value2])

Answer 5

Instead of passing the same parameter multiple times to where() like this

User.where(
  "first_name like ? or last_name like ? or city like ?", 
  "%#{search}%", "%#{search}%", "%#{search}%"
)

you can easily provide a hash

User.where(
  "first_name like :search or last_name like :search or city like :search",
  {search: "%#{search}%"}
)

that makes your query much more readable for long argument lists.

Answer 6

Sounds like you're doing something like this:

Model.where("attribute = ? OR attribute2 = ?", [value, value])

Whereas you need to do this:

# notice the lack of an array as the last argument
Model.where("attribute = ? OR attribute2 = ?", value, value)

Have a look at http://guides.rubyonrails.org/active_record_querying.html#array-conditions for more details on how this works.