Question

So this is what I have in my dev (SQLite) environment that works perfectly:

key = "%#{keywords}%"
listings = Listing.order(:headline)
listings = listings.includes(:neighborhood).where("headline like ? or neighborhoods.name like ?", key, key) if keywords.present?

But, when I try something similar on Heroku, I get a number of errors:

listings = listings.includes(:neighborhood).where("headline like ? or neighborhoods.name like ?", key, key)
ActiveRecord::ConfigurationError: Association named 'neighborhoods' was not found; perhaps you misspelled it?

I also tried the following & got the corresponding error:

> listings = Listing.includes(:neighborhood).where("headline like :keywords or neighborhood.name like :keywords", :keywords => "%#{keywords}%")
  SQL (3.1ms)  SELECT "listings"."id" AS t0_r0, "listings"."listing_category_id" AS t0_r1, "listings"."listing_type_id" AS t0_r2, "listings"."user_id" AS t0_r3, "listings"."boro_id" AS t0_r4, "listings"."neighborhood_id" AS t0_r5, "listings"."building_id" AS t0_r6, "listings"."term_id" AS t0_r7, "listings"."headline" AS t0_r8, "listings"."property_type_id" AS t0_r9, "listings"."unit_num" AS t0_r10, "listings"."common_charges" AS t0_r11, "listings"."taxes" AS t0_r12, "listings"."maintenance" AS t0_r13, "listings"."num_bedrooms" AS t0_r14, "listings"."num_bathrooms" AS t0_r15, "listings"."square_footage" AS t0_r16, "listings"."list_square_footage" AS t0_r17, "listings"."description" AS t0_r18, "listings"."condition_id" AS t0_r19, "listings"."pet_policy_id" AS t0_r20, "listings"."exposure_id" AS t0_r21, "listings"."floor_plan" AS t0_r22, "listings"."photo" AS t0_r23, "listings"."security" AS t0_r24, "listings"."coop_deductible" AS t0_r25, "listings"."flip_tax" AS t0_r26, "listings"."house_families" AS t0_r27, "listings"."house_extensions" AS t0_r28, "listings"."house_stories" AS t0_r29, "listings"."house_units" AS t0_r30, "listings"."created_at" AS t0_r31, "listings"."updated_at" AS t0_r32, "listings"."price" AS t0_r33, "neighborhoods"."id" AS t1_r0, "neighborhoods"."name" AS t1_r1, "neighborhoods"."created_at" AS t1_r2, "neighborhoods"."updated_at" AS t1_r3, "neighborhoods"."boro_id" AS t1_r4 FROM "listings" LEFT OUTER JOIN "neighborhoods" ON "neighborhoods"."id" = "listings"."neighborhood_id" WHERE (headline like '%prospect heights%' or neighborhood.name like '%prospect heights%')
ActiveRecord::StatementInvalid: PG::Error: ERROR:  missing FROM-clause entry for table "neighborhood"
LINE 1: ..._id" WHERE (headline like '%prospect heights%' or neighborho...
                                                             ^
: SELECT "listings"."id" AS t0_r0, "listings"."listing_category_id" AS t0_r1, "listings"."listing_type_id" AS t0_r2, "listings"."user_id" AS t0_r3, "listings"."boro_id" AS t0_r4, "listings"."neighborhood_id" AS t0_r5, "listings"."building_id" AS t0_r6, "listings"."term_id" AS t0_r7, "listings"."headline" AS t0_r8, "listings"."property_type_id" AS t0_r9, "listings"."unit_num" AS t0_r10, "listings"."common_charges" AS t0_r11, "listings"."taxes" AS t0_r12, "listings"."maintenance" AS t0_r13, "listings"."num_bedrooms" AS t0_r14, "listings"."num_bathrooms" AS t0_r15, "listings"."square_footage" AS t0_r16, "listings"."list_square_footage" AS t0_r17, "listings"."description" AS t0_r18, "listings"."condition_id" AS t0_r19, "listings"."pet_policy_id" AS t0_r20, "listings"."exposure_id" AS t0_r21, "listings"."floor_plan" AS t0_r22, "listings"."photo" AS t0_r23, "listings"."security" AS t0_r24, "listings"."coop_deductible" AS t0_r25, "listings"."flip_tax" AS t0_r26, "listings"."house_families" AS t0_r27, "listings"."house_extensions" AS t0_r28, "listings"."house_stories" AS t0_r29, "listings"."house_units" AS t0_r30, "listings"."created_at" AS t0_r31, "listings"."updated_at" AS t0_r32, "listings"."price" AS t0_r33, "neighborhoods"."id" AS t1_r0, "neighborhoods"."name" AS t1_r1, "neighborhoods"."created_at" AS t1_r2, "neighborhoods"."updated_at" AS t1_r3, "neighborhoods"."boro_id" AS t1_r4 FROM "listings" LEFT OUTER JOIN "neighborhoods" ON "neighborhoods"."id" = "listings"."neighborhood_id" WHERE (headline like '%prospect heights%' or neighborhood.name like '%prospect heights%')

I also tried and got the following error:

0> listings = Listing.joins(:neighborhood).where("headline like :keywords or neighborhood.name like :keywords", :keywords => "%#{keywords}%")
  Listing Load (2.7ms)  SELECT "listings".* FROM "listings" INNER JOIN "neighborhoods" ON "neighborhoods"."id" = "listings"."neighborhood_id" WHERE (headline like '%prospect heights%' or neighborhood.name like '%prospect heights%')
ActiveRecord::StatementInvalid: PG::Error: ERROR:  missing FROM-clause entry for table "neighborhood"
LINE 1: ..._id" WHERE (headline like '%prospect heights%' or neighborho...
                                                             ^
: SELECT "listings".* FROM "listings" INNER JOIN "neighborhoods" ON "neighborhoods"."id" = "listings"."neighborhood_id" WHERE (headline like '%prospect heights%' or neighborhood.name like '%prospect heights%')

Thoughts?

Thanks.

Edit 1:

A listing belongs_to neighborhood, and neighborhood has_many listings.

Edit 2:

Extracted one of the SQL statements and ran it via psql, this is the result:

SELECT "listings".* FROM "listings" INNER JOIN "neighborhoods" ON "neighborhoods"."id" = "listings"."neighborhood_id" WHERE (headline like '%prospect heights%' or neighborhood.name like '%prospect heights%');                                                                                                                                                                 
ERROR:  missing FROM-clause entry for table "neighborhood"
LINE 1: ..._id" WHERE (headline like '%prospect heights%' or neighborho...

Answer 1

Try the below:

listings = Listing.includes(:neighborhood).where("listings.headline like :keywords or neighborhoods.name like :keywords", :keywords => "%#{keywords}%")

I think it should call listings.headline instead of headline

SELECT "listings".* FROM "listings" INNER JOIN "neighborhoods"   
ON "neighborhoods"."id" = "listings"."neighborhood_id"  
WHERE (
headline like '%prospect heights%'               #I mean here
or neighborhood.name like '%prospect heights%')  #also here, should be neighborhoods.name 

EDIT – do you know that there are some difference between SQLite and PostgreSQL? I faced a similar problem. I think you want ILIKE instead of LIKE:

listings = Listing.includes(:neighborhood).where("listings.headline ilike :keywords or neighborhoods.name ilike :keywords", :keywords => "%#{keywords}%")