Heroku join/includes not working like sqlite dev environment - ruby-on-rails

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}%")

Answer 2

Reformatted query:
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%');
Problem seems obvious. You include table "neighborhoods", but later on are trying to use "neighborhood".
How to fix that in RoR - no idea, but perhaps it will be enough to point you in right direction.

Answer 3

The best way to diagnose this is to make sure your development and production environments match as closely as possible, and actually run PostgreSQL locally. Inevitably, you will encounter inconsistencies between SQLite and PostgreSQL that are difficult to debug, or will surprise you when you push your code.
If you're on a Mac, Heroku Postgres has a standalone application you can download and use with no configuration: http://postgresapp.com/