Passing params between controller methods

Hi all

I’d like to call some controller methods from other controller
methods after first modifying the params hash.

Class MyController < ApplicationController
def quirky_method
if condtion
do_stuff
else
params.merge “some_key” => “here is some new data”
another_controller_method
end
end

the problem ive got is that the new data in the hash isn’t available
inside ‘another_controller_method’. i’ve also tried ‘self.params’ and
@params’, but doesnt seem to work -whats the best way to approach
this?
thx
glenn

On 2/11/07, glenn [email protected] wrote:

 else
    params.merge "some_key" => "here is some new data"
    another_controller_method

end
end

the problem ive got is that the new data in the hash isn’t available
inside ‘another_controller_method’. i’ve also tried ‘self.params’ and
@params’, but doesnt seem to work -whats the best way to approach
this?

The reason the params aren’t updated is that #merge is not a
destructive method. It returns a new Hash which you’re just throwing
away (not referencing or assigning to a variable).

There is a destructive version, #merge!, which does what you want.
Just add the exclamation point, and you’ll get what you’re expecting.

But, I think what you should probably do is make
another_controller_method accept the parameters it’s expecting as
explicit arguments and call it like that. Munging params is bound to
lead to some messes later on.

Chad

The reason the params aren’t updated is that #merge is not a
destructive method. It returns a new Hash which you’re just throwing
away (not referencing or assigning to a variable).

There is a destructive version, #merge!, which does what you want.
Just add the exclamation point, and you’ll get what you’re expecting.

ok - a vital detail - thanks chad - dangers of learning a language
along with a toolkit implimented in it

But, I think what you should probably do is make
another_controller_method accept the parameters it’s expecting as
explicit arguments and call it like that. Munging params is bound to
lead to some messes later on.
good advice - thanks, what i ended up doing in end

thanks again chad
glenn

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