undefined method `coffeeprocess' for nil:NilClass
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I'm getting the above error when trying to reference an associated value from a different table.
I have two models with a one-to-many association.
class Roast < ApplicationRecord
has_one :processing
class Processing < ApplicationRecord
belongs_to :roast
I have added a process_id column to the Roasts table.
Roasts represent an individual coffee roast, and processing represents one of three processes in the production of that coffee.
Processing is populated with three static strings, that I make available in the roasts form via a 'collection_select' field.
<%= form.collection_select(:process_id, Processing.order(:coffeeprocess), :id, :coffeeprocess, :prompt => 'Select Process') %>
I am able to assign a process to an individual roast, and I can see the corresponding ID in the process_id column.
However, when I go to the roasts show page, I get the error: undefined method 'coffeeprocess' for nil:NilClass which I understand is telling me the value is Nil.
I'm using the following in my show page.
<%= @roast.processing.coffeeprocess %>
Any ideas where this is going wrong?
ruby-on-rails activerecord
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
add a comment |
I'm getting the above error when trying to reference an associated value from a different table.
I have two models with a one-to-many association.
class Roast < ApplicationRecord
has_one :processing
class Processing < ApplicationRecord
belongs_to :roast
I have added a process_id column to the Roasts table.
Roasts represent an individual coffee roast, and processing represents one of three processes in the production of that coffee.
Processing is populated with three static strings, that I make available in the roasts form via a 'collection_select' field.
<%= form.collection_select(:process_id, Processing.order(:coffeeprocess), :id, :coffeeprocess, :prompt => 'Select Process') %>
I am able to assign a process to an individual roast, and I can see the corresponding ID in the process_id column.
However, when I go to the roasts show page, I get the error: undefined method 'coffeeprocess' for nil:NilClass which I understand is telling me the value is Nil.
I'm using the following in my show page.
<%= @roast.processing.coffeeprocess %>
Any ideas where this is going wrong?
ruby-on-rails activerecord
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
Fire uprails cand see if theroastin question really does have aprocessingobject set.
– vich
Nov 26 '18 at 21:47
add a comment |
I'm getting the above error when trying to reference an associated value from a different table.
I have two models with a one-to-many association.
class Roast < ApplicationRecord
has_one :processing
class Processing < ApplicationRecord
belongs_to :roast
I have added a process_id column to the Roasts table.
Roasts represent an individual coffee roast, and processing represents one of three processes in the production of that coffee.
Processing is populated with three static strings, that I make available in the roasts form via a 'collection_select' field.
<%= form.collection_select(:process_id, Processing.order(:coffeeprocess), :id, :coffeeprocess, :prompt => 'Select Process') %>
I am able to assign a process to an individual roast, and I can see the corresponding ID in the process_id column.
However, when I go to the roasts show page, I get the error: undefined method 'coffeeprocess' for nil:NilClass which I understand is telling me the value is Nil.
I'm using the following in my show page.
<%= @roast.processing.coffeeprocess %>
Any ideas where this is going wrong?
ruby-on-rails activerecord
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
I'm getting the above error when trying to reference an associated value from a different table.
I have two models with a one-to-many association.
class Roast < ApplicationRecord
has_one :processing
class Processing < ApplicationRecord
belongs_to :roast
I have added a process_id column to the Roasts table.
Roasts represent an individual coffee roast, and processing represents one of three processes in the production of that coffee.
Processing is populated with three static strings, that I make available in the roasts form via a 'collection_select' field.
<%= form.collection_select(:process_id, Processing.order(:coffeeprocess), :id, :coffeeprocess, :prompt => 'Select Process') %>
I am able to assign a process to an individual roast, and I can see the corresponding ID in the process_id column.
However, when I go to the roasts show page, I get the error: undefined method 'coffeeprocess' for nil:NilClass which I understand is telling me the value is Nil.
I'm using the following in my show page.
<%= @roast.processing.coffeeprocess %>
Any ideas where this is going wrong?
ruby-on-rails activerecord
ruby-on-rails activerecord
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
edited Nov 26 '18 at 20:47
Simon Cooper
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
asked Nov 26 '18 at 17:36
Simon CooperSimon Cooper
589827
589827
Fire uprails cand see if theroastin question really does have aprocessingobject set.
– vich
Nov 26 '18 at 21:47
add a comment |
Fire uprails cand see if theroastin question really does have aprocessingobject set.
– vich
Nov 26 '18 at 21:47
Fire up
rails c and see if the roast in question really does have a processing object set.– vich
Nov 26 '18 at 21:47
Fire up
rails c and see if the roast in question really does have a processing object set.– vich
Nov 26 '18 at 21:47
add a comment |
1 Answer
1
active
oldest
votes
You are getting nil:NilClass because Rails doesn't understand the relationship between Roasts and Processing.
Try
class Roast < ApplicationRecord
belongs_to :processing
See the documentation for ActiveRecord Associations for more.
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
add a comment |
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1 Answer
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active
oldest
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You are getting nil:NilClass because Rails doesn't understand the relationship between Roasts and Processing.
Try
class Roast < ApplicationRecord
belongs_to :processing
See the documentation for ActiveRecord Associations for more.
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
add a comment |
You are getting nil:NilClass because Rails doesn't understand the relationship between Roasts and Processing.
Try
class Roast < ApplicationRecord
belongs_to :processing
See the documentation for ActiveRecord Associations for more.
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
add a comment |
You are getting nil:NilClass because Rails doesn't understand the relationship between Roasts and Processing.
Try
class Roast < ApplicationRecord
belongs_to :processing
See the documentation for ActiveRecord Associations for more.
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
You are getting nil:NilClass because Rails doesn't understand the relationship between Roasts and Processing.
Try
class Roast < ApplicationRecord
belongs_to :processing
See the documentation for ActiveRecord Associations for more.
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
answered Nov 26 '18 at 18:05
Tristin BakerTristin Baker
83
83
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
add a comment |
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
I believe it would be the other way round and have updated my OP. However, I still get the same result either way.
– Simon Cooper
Nov 26 '18 at 20:47
add a comment |
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Fire up
rails cand see if theroastin question really does have aprocessingobject set.– vich
Nov 26 '18 at 21:47