I have two models:
Exercise, and Step. Exercise has many steps.
Basically, when I add a step to a new exercise's "steps" array, it
saves, and everything works. If I then get the exercise from the model
(via find), clear its array, then add the step again, I cannot save
the step to the exercise. Here is a console dump which shows exactly
what happens:
----------
>> a = Exercise.new
=> #<Exercise id: nil, name: nil, description: nil, image: nil,
created_at: nil,
updated_at: nil>
>> a.name = "The Name"
=> "The Name"
>> b = Step.new
=> #<Step id: nil, description: nil, picture: nil, number: nil,
exercise_id: nil
, created_at: nil, updated_at: nil, name: nil>
>> c = Step.new
=> #<Step id: nil, description: nil, picture: nil, number: nil,
exercise_id: nil
, created_at: nil, updated_at: nil, name: nil>
>> a.save
=> true
>> b.save
=> true
>> c.save
=> true
>> a.steps << b
=> [#<Step id: 35, description: nil, picture: nil, number: nil,
exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:38",
name: nil
>]
>> a.steps << c
=> [#<Step id: 35, description: nil, picture: nil, number: nil,
exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:38",
name: nil
>, #<Step id: 36, description: nil, picture: nil, number: nil, exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:40",
name: nil>
]
>> a.save
=> true
>> a = Exercise.find_by_name("The Name")
=> #<Exercise id: 26, name: "The Name", description: nil, image: nil,
created_at
: "2009-01-06 02:26:35", updated_at: "2009-01-06 02:26:35">
>> a.steps
=> [#<Step id: 35, description: nil, picture: nil, number: nil,
exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:38",
name: nil
>, #<Step id: 36, description: nil, picture: nil, number: nil, exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:40",
name: nil>
]
>> a.steps.clear()
=> []
>> a.steps << b
=> [#<Step id: 35, description: nil, picture: nil, number: nil,
exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:38",
name: nil
>]
>> a.steps << c
=> [#<Step id: 35, description: nil, picture: nil, number: nil,
exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:38",
name: nil
>, #<Step id: 36, description: nil, picture: nil, number: nil, exercise_id: 26,
created_at: "2009-01-06 02:26:36", updated_at: "2009-01-06 02:26:40",
name: nil>
]
>> a.save
=> true
>> b.save
=> true
>> c.save
=> true
>> a = Exercise.find_by_name("The Name")
=> #<Exercise id: 26, name: "The Name", description: nil, image: nil,
created_at
: "2009-01-06 02:26:35", updated_at: "2009-01-06 02:26:35">
>> a.steps
=> []
----------
What is going on here? This is so anti-intuitive - how could a bug
like this exist and not have been detected hundreds of times before?
Thanks for the help!
-Bigsley
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