follow_up_visit.rb

class FollowUpVisit <ActiveRecord::Base
	belongs_to :gardener
	has_one :follow_up_visit_eating
	has_one :follow_up_visit_garden
	has_one :follow_up_visit_impression
	has_one :follow_up_visit_selling
end

follow_up_visit_eating.rb

class FollowUpVisitEating <ActiveRecord::Base
	belongs_to :follow_up_visit
end

follow_up_visit_garden.rb

class FollowUpVisitGarden <ActiveRecord::Base
	belongs_to :follow_up_visit
end

rails_console.txt

:094 > f = FollowUpVisit.last
  FollowUpVisit Load (1.5ms)  SELECT  "follow_up_visits".* FROM "follow_up_visits"   ORDER BY "follow_up_visits"."id" DESC LIMIT 1
  FollowUpVisit Load (1.5ms)  SELECT  "follow_up_visits".* FROM "follow_up_visits"   ORDER BY "follow_up_visits"."id" DESC LIMIT 1
 => #<FollowUpVisit id: 19, created_at: "2015-07-05 21:47:36", updated_at: "2015-07-05 21:47:36", gardener_id: 2> 
2.1.2 :095 > f.follow_up_visit_garden
  FollowUpVisitGarden Load (1.1ms)  SELECT  "follow_up_visit_gardens".* FROM "follow_up_visit_gardens"  WHERE "follow_up_visit_gardens"."follow_up_visit_id" = $1 LIMIT 1  [["follow_up_visit_id", 19]]
  FollowUpVisitGarden Load (1.1ms)  SELECT  "follow_up_visit_gardens".* FROM "follow_up_visit_gardens"  WHERE "follow_up_visit_gardens"."follow_up_visit_id" = $1 LIMIT 1  [["follow_up_visit_id", 19]]
 => nil 
2.1.2 :096 > f.follow_up_visit_impression
  FollowUpVisitImpression Load (0.3ms)  SELECT  "follow_up_visit_impressions".* FROM "follow_up_visit_impressions"  WHERE "follow_up_visit_impressions"."follow_up_visit_id" = $1 LIMIT 1  [["follow_up_visit_id", 19]]
  FollowUpVisitImpression Load (0.3ms)  SELECT  "follow_up_visit_impressions".* FROM "follow_up_visit_impressions"  WHERE "follow_up_visit_impressions"."follow_up_visit_id" = $1 LIMIT 1  [["follow_up_visit_id", 19]]
 => nil 
2.1.2 :097 > f.follow_up_visit_selling
  FollowUpVisitSelling Load (43.6ms)  SELECT  "follow_up_visit_sellings".* FROM "follow_up_visit_sellings"  WHERE "follow_up_visit_sellings"."follow_up_visit_id" = $1 LIMIT 1  [["follow_up_visit_id", 19]]
  FollowUpVisitSelling Load (43.6ms)  SELECT  "follow_up_visit_sellings".* FROM "follow_up_visit_sellings"  WHERE "follow_up_visit_sellings"."follow_up_visit_id" = $1 LIMIT 1  [["follow_up_visit_id", 19]]
 => nil 
2.1.2 :098 > f.follow_up_visit_eating
PG::UndefinedColumn: ERROR:  column follow_up_visit_eatings.follow_up_visit_id does not exist
LINE 1: ..._eatings".* FROM "follow_up_visit_eatings"  WHERE "follow_up...
                                                             ^
: SELECT  "follow_up_visit_eatings".* FROM "follow_up_visit_eatings"  WHERE "follow_up_visit_eatings"."follow_up_visit_id" = $1 LIMIT 1
PG::UndefinedColumn: ERROR:  column follow_up_visit_eatings.follow_up_visit_id does not exist
LINE 1: ..._eatings".* FROM "follow_up_visit_eatings"  WHERE "follow_up...
                                                             ^
: SELECT  "follow_up_visit_eatings".* FROM "follow_up_visit_eatings"  WHERE "follow_up_visit_eatings"."follow_up_visit_id" = $1 LIMIT 1
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR:  column follow_up_visit_eatings.follow_up_visit_id does not exist
LINE 1: ..._eatings".* FROM "follow_up_visit_eatings"  WHERE "follow_up...
                                                             ^
: SELECT  "follow_up_visit_eatings".* FROM "follow_up_visit_eatings"  WHERE "follow_up_visit_eatings"."follow_up_visit_id" = $1 LIMIT 1

schema.rb

create_table "follow_up_visit_eatings", force: true do |t|
    t.integer "gardener_id"
    t.integer "eating_sum"
    t.string  "veg_type_eaten"
    t.boolean "eating"
    t.integer "folow_up_visit_id"
  end

  create_table "follow_up_visit_gardens", force: true do |t|
    t.integer "gardener_id"
    t.boolean "still_gardening"
    t.string  "rating"
    t.boolean "mini_nursery"
    t.boolean "compost_heap"
    t.boolean "trench_bed"
    t.integer "trench_bed_sum"
    t.boolean "container_garden"
    t.integer "container_garden_sum"
    t.boolean "other"
    t.string  "other_qualitative"
    t.date    "date_created"
    t.integer "follow_up_visit_id"
  end

  create_table "follow_up_visit_impressions", force: true do |t|
    t.integer "gardener_id"
    t.string  "future_plan"
    t.text    "issue"
    t.text    "positive"
    t.text    "negative"
    t.text    "general_comment"
    t.integer "follow_up_visit_id"
  end

  create_table "follow_up_visit_sellings", force: true do |t|
    t.integer "gardener_id"
    t.boolean "selling"
    t.string  "selling_what"
    t.string  "selling_amount"
    t.integer "follow_up_visit_id"
  end