Hello,

I just ran into a strange error. In console I typed in following:
ruby-1.9.2-p290 :120 > User.first.to_json
User Load (0.7ms) SELECT `users`.* FROM `users` LIMIT 1
=>
"{\"avatar_id\":10,\"email\":\"peter@example.org\",\"firstname\":\"Peter\",\"lastname\":\"L\",\"user_role_id\":11}"

and when I try that with an avatar:
ruby-1.9.2-p290 :121 > Avatar.first.to_json
Avatar Load (0.5ms) SELECT `avatars`.* FROM `avatars` LIMIT 1
NoMethodError: Attribute Load (0.8ms) SELECT `attributes`.* FROM
`attributes` WHERE `attributes`.`avatar_id` = 10
undefined method `keys' for #<ActiveRecord::Relation:0x007fb6a3e69518>

Why on earth can I convert the user model to json but not the avatar?!

Any suggestions appreciated!
Hans

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  • Colin Law at Oct 5, 2011 at 3:14 pm

    On 5 October 2011 16:00, Heinz Strunk wrote:
    Hello,

    I just ran into a strange error. In console I typed in following:
    ruby-1.9.2-p290 :120 > User.first.to_json
    User Load (0.7ms)  SELECT `users`.* FROM `users` LIMIT 1
    =>
    "{\"avatar_id\":10,\"email\":\"peter@example.org\",\"firstname\":\"Peter\",\"lastname\":\"L\",\"user_role_id\":11}"

    and when I try that with an avatar:
    ruby-1.9.2-p290 :121 > Avatar.first.to_json
    Avatar Load (0.5ms)  SELECT `avatars`.* FROM `avatars` LIMIT 1
    NoMethodError:   Attribute Load (0.8ms)  SELECT `attributes`.* FROM
    `attributes` WHERE `attributes`.`avatar_id` = 10
    undefined method `keys' for #<ActiveRecord::Relation:0x007fb6a3e69518>
    Can you show us the start of avatar.rb and attribute.rb?

    Also I just wonder whether attribute is a reserved word in RoR.

    Colin
    Why on earth can I convert the user model to json but not the avatar?!

    Any suggestions appreciated!
    Hans

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  • Heinz Strunk at Oct 5, 2011 at 3:31 pm
    Oh, yeah. You might be right with the reserved word!

    avatar.rb:
    class Avatar < ActiveRecord::Base
    attr_accessible :name, :level, :current_xp, :overall_xp, :gender_cd
    as_enum :gender, :female => 0, :male => 1
    has_one :user
    has_many :attributes
    ...

    attribute.rb:
    class Attribute < ActiveRecord::Base
    belongs_to :attribute_type
    belongs_to :avatar

    Do I need to rename the whole model now?

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  • Heinz Strunk at Oct 5, 2011 at 3:32 pm
    Ehm, yes.

    Changing it to
    has_many :avatar_attributes, :class_name => 'Attribute'
    did the trick.


    Thanks a lot for the hint, Colin!

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  • Colin Law at Oct 5, 2011 at 3:37 pm

    On 5 October 2011 16:32, Heinz Strunk wrote:
    Ehm, yes.

    Changing it to
    has_many :avatar_attributes, :class_name => 'Attribute'
    did the trick.


    Thanks a lot for the hint, Colin!
    Glad to be of help.

    Colin
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grouprubyonrails-talk @
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postedOct 5, '11 at 3:00p
activeOct 5, '11 at 3:37p
posts5
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websiterubyonrails.org
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