Problem passing id of parent model to child

Rails
1

Hey fellas,

I have an Organization model with many projects. I have a link to a new
project from the organization’s show view, like so:
new_organization_project_path (@organization). I was hoping Rails would
get
the id of the organization from the instance I am passing and populate
project.organization_id, but to no avail. The db rollbacks back and get
redirected to the new project page. Any ideas? How would you normally do
this?

Best,

2

What path do you get? It should be something like
“/organizations/:id/projects/new”. This is where you can add a form for
example to add a new project.

Do you try to POST to that path above? If so, that’s wrong (it’s for GET
requests). Read more about nested resources here:

//Linus

Den torsdagen den 1:e november 2012 kl. 22:02:36 UTC+1 skrev why-el:

3

Yes that’s what I get as a path. I have solved this issue. Its silly
really, it turns out I needed to make an @organization instance
available
throughout my projectsController, so I made a before filter to fetch it
based on the url.

Quick question though, do I need to update all the controller methods to
reference the parent model whenever I have a one to many relationship
like
this one (changing everything to @organization.projects.someMethod)?
This
looks tedious to me. Does Rails help with this?

4

On 1 November 2012 21:02, why-el [email protected] wrote:

Hey fellas,

I have an Organization model with many projects. I have a link to a new
project from the organization’s show view, like so:
new_organization_project_path (@organization). I was hoping Rails would get
the id of the organization from the instance I am passing and populate
project.organization_id, but to no avail. The db rollbacks back and get
redirected to the new project page. Any ideas? How would you normally do
this?

Have a look at the the Rails Guide on debugging. It will show you
techniques that you can use to debug your code.
Hint - start by looking in development.log to see what action is
called and what the parameters are.

Colin

5

On 1 November 2012 23:32, why-el [email protected] wrote:

Yes that’s what I get as a path. I have solved this issue. Its silly really,
it turns out I needed to make an @organization instance available throughout
my projectsController, so I made a before filter to fetch it based on the
url.

As a beginner I suggest you work through a good tutorial on Rails to
give you understanding of the basics. railstutorial.org is good and
is free to use online.

Quick question though, do I need to update all the controller methods to
reference the parent model whenever I have a one to many relationship like
this one (changing everything to @organization.projects.someMethod)? This
looks tedious to me. Does Rails help with this?

I don’t understand the question. Can you give a particular example?

Colin