Rails-find_by_sql +存储过程

Question

I am trying to get objects from my MySQL database using a stored procedure I have created.

@locs = Location.find_by_sql("CALL geodist(100.4058, 37.7907, 10000, 'Sample')")

This results in the following error

Location Load (6.4ms)  CALL geodist(100.4058, 37.7907, 10000, 'Sample')
Completed   in 37ms

Mysql2::Error (Commands out of sync; you can't run this command now):

The following however works fine:

@locations = Location.connection.select_all("CALL geodist(100.4058, 37.7907, 10000, 'Sample')")

However, it doesn't return objects, only a hash of values.

Is there any way to get find_by_sql to work? If not, how can I manually instantiate AR models without querying the database again?

Thanks!

Answer 1

you can build objects yourself by sending every hash to constructor of your active record model

@locations = Location.connection.select_all("CALL geodist(100.4058, 37.7907, 10000, 'Sample')")
results = Array.new
@locations.each do |location|
  results[] = Location.new(location)
end

UPD: by the way it's strange behaviour I just looked at find_by_sql method realization it looks familiar http://api.rubyonrails.org/classes/ActiveRecord/Base.html#method-c-find_by_sql