Here a final questions, not sure if you may know. I installed
activeadmin has a gem and it allow me to manage any customer, interest
and a manager to control when this one is expired or so
It has the following associations
class Client < ActiveRecord::Base
has_many :music_interest_managers
has_many :music_interests, through => :music_interest_managers
end
class MusicInterest < ActiveRecord::Base
has_many :music_interest_managers
has_many :clients, through => :music_interest_managers
end
class MusicInterestManager < ActiveRecord::Base
belongs_to :music_interests
How many music_interests does it belong to. The fact that you have
used the plural suggests it belongs to several, but that does not seem
likely.
belongs_to :client
end
But when installing a resources for MusicInterestManager I get the
following error!
Showing
/home/jean/.rvm/gems/ruby-1.9.3-p194/gems/activeadmin-0.4.4/app/views/active_admin/resource/index.html.arb
where line #1 raised:
Just a side-note here. I really STRONGLY recommend that you don't jump into an "easy" admin tool like this until you have worked out the very basic way that Rails works. These toolkits introduce a second level of abstraction over Rails, and while they can jump-start a site and give you 90% of what you need right out of the box, they also keep you from learning how the system works, which will rear up and bite you later. Further, they can often make that last 10% nearly impossible to attain, and complicate the process of learning even more.
class MusicInterest < ActiveRecord::Base
has_many :music_interest_managers
has_many :clients, through => :music_interest_managers
end
class MusicInterestManager < ActiveRecord::Base
belongs_to :music_interests
How many music_interests does it belong to. The fact that you have
used the plural suggests it belongs to several, but that does not seem
likely.
ActivitiesManager and Customers? Where did they come from?
How are you getting on with the tutorials?
Colin
Sorry the example customer and music_interest_manager was just an
example, the customer and activities_managers is my actual names. Here
the real test lookup
class ActivitiesManager < ActiveRecord::Base
belongs_to :customers
belongs_to :activities
class Activity < ActiveRecord::Base
has_many :activities_managers
has_many :customers, :through => :activities_managers
class Customer < ActiveRecord::Base
has_many :activities_managers
has_many :activities, :through => :activities_managers
I am just using this tools for administrative backend feature not the
front end. I am just curious the way I wrote it down to see if its
correct or if something else is wrong with my style of writing ruby.
class MusicInterest < ActiveRecord::Base
has_many :music_interest_managers
has_many :clients, through => :music_interest_managers
end
class MusicInterestManager < ActiveRecord::Base
belongs_to :music_interests
How many music_interests does it belong to. The fact that you have
used the plural suggests it belongs to several, but that does not seem
likely.
ActivitiesManager and Customers? Where did they come from?
How are you getting on with the tutorials?
Colin
Sorry the example customer and music_interest_manager was just an
example, the customer and activities_managers is my actual names. Here
the real test lookup
class ActivitiesManager < ActiveRecord::Base
belongs_to :customers
If you followed my advise and worked through some tutorials you might
not make so many silly mistakes. How many customers does an
ActivitiesManager belong to? The fact that you have said belongs_to
customers suggests that it belongs to more than one customer, which is
unlikely.
used the plural suggests it belongs to several, but that does not seem
example, the customer and activities_managers is my actual names. Here
the real test lookup
class ActivitiesManager < ActiveRecord::Base
belongs_to :customers
If you followed my advise and worked through some tutorials you might
not make so many silly mistakes. How many customers does an
ActivitiesManager belong to? The fact that you have said belongs_to
customers suggests that it belongs to more than one customer, which is
unlikely.
belongs_to :activities
Ditto
Colin
It his has follow
Customer Manager Activity
John John 1 2012-01-05 1 Soccer
Josh John 3 2012-01-07 2 Hockey
Josh 2 2012-01-05 3 Footbal
The purpose is to keep track of everything
So there the model
Customer has_many Manager
Manager belongs to Customer
Manager belongs to Activity
Activity has_one Manager
So my structure should be as follow:
class ActivitiesManager < ActiveRecord::Base
belongs_to :customers
belongs_to :activities
class Activity < ActiveRecord::Base
has_one :activities_manager
class Customer < ActiveRecord::Base
has_many :activities_managers
has_many :activities, :through => :activities_managers
Reading it is not enough. Work right through it, typing and running
the code on your PC, make sure you understand every single line of
code. Do all the exercises.
Please answer the question - how many customers does an
activitiesmanager belong to?
An activity manager can have multiple customer and repeat many time the
same customer. but an activity manager can only have one to one activity
So it should be has follow
class ActivitiesManager < ActiveRecord::Base
belongs_to :customers
belongs_to :activity
class Activity < ActiveRecord::Base
has_one :activities_manager
class Customer < ActiveRecord::Base
has_many :activities_managers
has_many :activities, :through => :activities_managers
Reading it is not enough. Work right through it, typing and running
the code on your PC, make sure you understand every single line of
code. Do all the exercises.
In term of exercise i have done up to chapter 9 so far
Please answer the question - how many customers does an
activitiesmanager belong to?
An activity manager can have multiple customer and repeat many time the
same customer. but an activity manager can only have one to one activity
So it should be has follow
class ActivitiesManager < ActiveRecord::Base
belongs_to :customers
The belongs_to association implies a one to many association, so an
activities manager can only have one customer as you have declared it
here, and belongs_to :customers is not valid. It must be belongs_to
:customer.
belongs_to :activity
class Activity < ActiveRecord::Base
has_one :activities_manager
class Customer < ActiveRecord::Base
has_many :activities_managers
has_many :activities, :through => :activities_managers
Reading it is not enough. Work right through it, typing and running
the code on your PC, make sure you understand every single line of
code. Do all the exercises.
In term of exercise i have done up to chapter 9 so far
The has_many, belongs_to association is dealt with in Chapter 10. I
suggest, once again, that you finish the tutorial before continuing
with your application.
