Caching with Rails

rubyonrails-talk
1

Hi,

I've been reading the Rails Guide about caching and I have a few questions about it. I've read that it is not possible to cache a page with url parameters, for instance 'http://…/com/products/category_id=5’. Am I correct? Isn't there any way to be able to do so?

If caching is only able on 'conditions' when do you use caching?

Thanks Greg

2

I’ve been reading the Rails Guide about caching and I have a few

questions about it.

I’ve read that it is not possible to cache a page with url parameters,

for instance ‘http://…/com/products/category_id=5’. Am I correct?

Isn’t there any way to be able to do so?

You can do it, but it depends on how you format your URLs because it makes a static HTML file for Apache to serve (and Apache won’t serve files with GET parameters in the name). For example, if your URL is:

http://www.example.com/products?category=5

This wouldn’t work because Apache automatically separates on ? and would look for a file called products.html (not your category 5 specific one).

On the other hand if your URL was:

http://www.example.com/products/category/5

Then it would work - the 5 would become 5.html in a folder called category in a folder called products.

Caching works with parameters, just not normal GET parameters like ?foo=bar.

Cheers,

Andy

3

Andy Jeffries wrote:

You can do it, but it depends on how you format your URLs because it makes a static HTML file for Apache to serve (and Apache won't serve files with GET parameters in the name). For example, if your URL is:

http://www.example.com/products?category=5

This wouldn't work because Apache automatically separates on ? and would look for a file called products.html (not your category 5 specific one).

On the other hand if your URL was:

http://www.example.com/products/category/5

Then it would work - the 5 would become 5.html in a folder called category in a folder called products.

Caching works with parameters, just not normal GET parameters like ?foo=bar.

Cheers,

Andy

Thank you Andy for you explanation. How do you do to make your urls look like this?

Greg

4

http://www.example.com/products/category/5

Then it would work - the 5 would become 5.html in a folder called

category

in a folder called products.

Thank you Andy for you explanation.

How do you do to make your urls look like this?

config/routes.rb

map.category “/products/category/:id”, :controller => “categories”, :action => “show”

How your URLs look is always a product of the Routing system.

Cheers,

Andy

5

Andy Jeffries wrote:

> http://www.example.com/products/category/5 > > Then it would work - the 5 would become 5.html in a folder called > category > in a folder called products.

Thank you Andy for you explanation. How do you do to make your urls look like this?

config/routes.rb

map.category "/products/category/:id", :controller => "categories", :action => "show"

Does the link_tag will still look like this: link_to "my link", products_path(:category_id => 3) ?