Rails Form “Must exist” Association
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I created this form, using simple form gem, for a post class of a forum:
<%= simple_form_for @post do |p| %>
<%= p.input :title, label: false, placeholder: 'Title', required: true %>
<%= p.input :description, as: :text, label: false, placeholder: 'Describe your post', required: true %>
<%= p.association :category, label: false, required: true,
collection: Category.order(:title), prompt: 'Choose category' %>
<%= p.button :submit %>
<% end %>
Now I go to the page and try to create a post and I get this:
Image for Form Error
I have no idea how to proceed since this objects (C, C++, etc) all exist. Here is where they were created, in seeds.rb
c1 = Category.create(title: "C++", image_url: 'http://www.freeiconspng.com/uploads/c--logo-icon-0.png')
c2 = Category.create(title: "Rails", image_url: 'http://perfectial.com/wp-content/uploads/2015/02/ruby.png')
c3 = Category.create(title: "Python", image_url: 'http://python.net/~goodger/projects/graphics/python/newlogo-repro.png')
c4 = Category.create(title: "Cobol", image_url: 'http://insights.dice.com/wp-content/uploads/2013/06/cobol.png')
c5 = Category.create(title: "C", image_url: 'https://d13yacurqjgara.cloudfront.net/users/28449/screenshots/1040285/cap-logo-ideas3.png')
c6 = Category.create(title: "Perl", image_url: 'http://news.perlfoundation.org/onion_logo.png')
And yes, I did run rake db:seed and restarted the server before trying it.
ruby-on-rails
add a comment |
up vote
1
down vote
favorite
I created this form, using simple form gem, for a post class of a forum:
<%= simple_form_for @post do |p| %>
<%= p.input :title, label: false, placeholder: 'Title', required: true %>
<%= p.input :description, as: :text, label: false, placeholder: 'Describe your post', required: true %>
<%= p.association :category, label: false, required: true,
collection: Category.order(:title), prompt: 'Choose category' %>
<%= p.button :submit %>
<% end %>
Now I go to the page and try to create a post and I get this:
Image for Form Error
I have no idea how to proceed since this objects (C, C++, etc) all exist. Here is where they were created, in seeds.rb
c1 = Category.create(title: "C++", image_url: 'http://www.freeiconspng.com/uploads/c--logo-icon-0.png')
c2 = Category.create(title: "Rails", image_url: 'http://perfectial.com/wp-content/uploads/2015/02/ruby.png')
c3 = Category.create(title: "Python", image_url: 'http://python.net/~goodger/projects/graphics/python/newlogo-repro.png')
c4 = Category.create(title: "Cobol", image_url: 'http://insights.dice.com/wp-content/uploads/2013/06/cobol.png')
c5 = Category.create(title: "C", image_url: 'https://d13yacurqjgara.cloudfront.net/users/28449/screenshots/1040285/cap-logo-ideas3.png')
c6 = Category.create(title: "Perl", image_url: 'http://news.perlfoundation.org/onion_logo.png')
And yes, I did run rake db:seed and restarted the server before trying it.
ruby-on-rails
add a comment |
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I created this form, using simple form gem, for a post class of a forum:
<%= simple_form_for @post do |p| %>
<%= p.input :title, label: false, placeholder: 'Title', required: true %>
<%= p.input :description, as: :text, label: false, placeholder: 'Describe your post', required: true %>
<%= p.association :category, label: false, required: true,
collection: Category.order(:title), prompt: 'Choose category' %>
<%= p.button :submit %>
<% end %>
Now I go to the page and try to create a post and I get this:
Image for Form Error
I have no idea how to proceed since this objects (C, C++, etc) all exist. Here is where they were created, in seeds.rb
c1 = Category.create(title: "C++", image_url: 'http://www.freeiconspng.com/uploads/c--logo-icon-0.png')
c2 = Category.create(title: "Rails", image_url: 'http://perfectial.com/wp-content/uploads/2015/02/ruby.png')
c3 = Category.create(title: "Python", image_url: 'http://python.net/~goodger/projects/graphics/python/newlogo-repro.png')
c4 = Category.create(title: "Cobol", image_url: 'http://insights.dice.com/wp-content/uploads/2013/06/cobol.png')
c5 = Category.create(title: "C", image_url: 'https://d13yacurqjgara.cloudfront.net/users/28449/screenshots/1040285/cap-logo-ideas3.png')
c6 = Category.create(title: "Perl", image_url: 'http://news.perlfoundation.org/onion_logo.png')
And yes, I did run rake db:seed and restarted the server before trying it.
ruby-on-rails
I created this form, using simple form gem, for a post class of a forum:
<%= simple_form_for @post do |p| %>
<%= p.input :title, label: false, placeholder: 'Title', required: true %>
<%= p.input :description, as: :text, label: false, placeholder: 'Describe your post', required: true %>
<%= p.association :category, label: false, required: true,
collection: Category.order(:title), prompt: 'Choose category' %>
<%= p.button :submit %>
<% end %>
Now I go to the page and try to create a post and I get this:
Image for Form Error
I have no idea how to proceed since this objects (C, C++, etc) all exist. Here is where they were created, in seeds.rb
c1 = Category.create(title: "C++", image_url: 'http://www.freeiconspng.com/uploads/c--logo-icon-0.png')
c2 = Category.create(title: "Rails", image_url: 'http://perfectial.com/wp-content/uploads/2015/02/ruby.png')
c3 = Category.create(title: "Python", image_url: 'http://python.net/~goodger/projects/graphics/python/newlogo-repro.png')
c4 = Category.create(title: "Cobol", image_url: 'http://insights.dice.com/wp-content/uploads/2013/06/cobol.png')
c5 = Category.create(title: "C", image_url: 'https://d13yacurqjgara.cloudfront.net/users/28449/screenshots/1040285/cap-logo-ideas3.png')
c6 = Category.create(title: "Perl", image_url: 'http://news.perlfoundation.org/onion_logo.png')
And yes, I did run rake db:seed and restarted the server before trying it.
ruby-on-rails
ruby-on-rails
asked Dec 4 '16 at 16:36
Vitor Falcão
153
153
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
6
down vote
accepted
This has very little to do with the language level object model and is framework/orm specific. belongs_to
associations in Rails 5 default to being non optional.
So if you for example have this setup:
class Post
belongs_to :category
end
class Category
has_many :posts
end
You will get a validation error if post.category_id
is nil.This can happen example if you have forgotten to whitelist the category_id
attribute.
def post_attributes
params.require(:post).permit(:title, :description, :category_id)
end
Additionally can declare the category
association as optional:
class Post
# this was the default behavior in Rails 4
belongs_to :category, optional: true
end
Did you meandef post_attributes
?
– Vitor Falcão
Dec 4 '16 at 17:12
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Additionally you should use.create!
in yourseeds.rb
- it will raise an error if the validation does not pass instead of silently failing.
– max
Dec 4 '16 at 17:15
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
|
show 3 more comments
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
6
down vote
accepted
This has very little to do with the language level object model and is framework/orm specific. belongs_to
associations in Rails 5 default to being non optional.
So if you for example have this setup:
class Post
belongs_to :category
end
class Category
has_many :posts
end
You will get a validation error if post.category_id
is nil.This can happen example if you have forgotten to whitelist the category_id
attribute.
def post_attributes
params.require(:post).permit(:title, :description, :category_id)
end
Additionally can declare the category
association as optional:
class Post
# this was the default behavior in Rails 4
belongs_to :category, optional: true
end
Did you meandef post_attributes
?
– Vitor Falcão
Dec 4 '16 at 17:12
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Additionally you should use.create!
in yourseeds.rb
- it will raise an error if the validation does not pass instead of silently failing.
– max
Dec 4 '16 at 17:15
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
|
show 3 more comments
up vote
6
down vote
accepted
This has very little to do with the language level object model and is framework/orm specific. belongs_to
associations in Rails 5 default to being non optional.
So if you for example have this setup:
class Post
belongs_to :category
end
class Category
has_many :posts
end
You will get a validation error if post.category_id
is nil.This can happen example if you have forgotten to whitelist the category_id
attribute.
def post_attributes
params.require(:post).permit(:title, :description, :category_id)
end
Additionally can declare the category
association as optional:
class Post
# this was the default behavior in Rails 4
belongs_to :category, optional: true
end
Did you meandef post_attributes
?
– Vitor Falcão
Dec 4 '16 at 17:12
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Additionally you should use.create!
in yourseeds.rb
- it will raise an error if the validation does not pass instead of silently failing.
– max
Dec 4 '16 at 17:15
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
|
show 3 more comments
up vote
6
down vote
accepted
up vote
6
down vote
accepted
This has very little to do with the language level object model and is framework/orm specific. belongs_to
associations in Rails 5 default to being non optional.
So if you for example have this setup:
class Post
belongs_to :category
end
class Category
has_many :posts
end
You will get a validation error if post.category_id
is nil.This can happen example if you have forgotten to whitelist the category_id
attribute.
def post_attributes
params.require(:post).permit(:title, :description, :category_id)
end
Additionally can declare the category
association as optional:
class Post
# this was the default behavior in Rails 4
belongs_to :category, optional: true
end
This has very little to do with the language level object model and is framework/orm specific. belongs_to
associations in Rails 5 default to being non optional.
So if you for example have this setup:
class Post
belongs_to :category
end
class Category
has_many :posts
end
You will get a validation error if post.category_id
is nil.This can happen example if you have forgotten to whitelist the category_id
attribute.
def post_attributes
params.require(:post).permit(:title, :description, :category_id)
end
Additionally can declare the category
association as optional:
class Post
# this was the default behavior in Rails 4
belongs_to :category, optional: true
end
edited Dec 4 '16 at 17:13
answered Dec 4 '16 at 17:02
![](https://i.stack.imgur.com/UFdOO.png?s=32&g=1)
![](https://i.stack.imgur.com/UFdOO.png?s=32&g=1)
max
44k856103
44k856103
Did you meandef post_attributes
?
– Vitor Falcão
Dec 4 '16 at 17:12
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Additionally you should use.create!
in yourseeds.rb
- it will raise an error if the validation does not pass instead of silently failing.
– max
Dec 4 '16 at 17:15
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
|
show 3 more comments
Did you meandef post_attributes
?
– Vitor Falcão
Dec 4 '16 at 17:12
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Additionally you should use.create!
in yourseeds.rb
- it will raise an error if the validation does not pass instead of silently failing.
– max
Dec 4 '16 at 17:15
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
Did you mean
def post_attributes
?– Vitor Falcão
Dec 4 '16 at 17:12
Did you mean
def post_attributes
?– Vitor Falcão
Dec 4 '16 at 17:12
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Yes, doing a little to much multitasking :)
– max
Dec 4 '16 at 17:14
Additionally you should use
.create!
in your seeds.rb
- it will raise an error if the validation does not pass instead of silently failing.– max
Dec 4 '16 at 17:15
Additionally you should use
.create!
in your seeds.rb
- it will raise an error if the validation does not pass instead of silently failing.– max
Dec 4 '16 at 17:15
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Well the "Must exist" problem stopped, get your correct answer :) but now I click create post and for some reason it is giving rollback transaction :/
– Vitor Falcão
Dec 4 '16 at 17:16
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
Do you have any uniqueness validations that might be failing?
– max
Dec 4 '16 at 17:17
|
show 3 more comments
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