ruby hashes iterations and assigning corresponding values

rubyonrails-talk
1

Hi, I have a Shops controller where I am getting params of shop as a hash. The params format is {“key1”=>“business”, “value1”=>“shoes”, “key2”=>“date”, “value2”=>“2014”, “key3”=>“price”, “value3”=>“3000”} In routes file I have written as match ‘/shops/:shop_id/new/:key1/:value1/:key2/:value2/:key3/:value3’, :to => ‘shops#new’ So in the browser I will type as localhost:3000/shops/3/new/business/shoes/date/2014/price/3000 The order of params will not be of same order sometimes. So in the url it can be like localhost:3000/shops/3/new/business/shoes/price/3000/date/2014 so that it should retrive corresponding params and assign the values. So I need to check the corresponding keys and assign values accordingly. That means for eg: If params[:key] contains business then value should be assigned as “shoes”, if params[:key] is date, then value should be assigned to “2014”.etc

How can I achieve it. Please help.

2

Hi,

I have a Shops controller where I am getting params of shop as a hash. The params format is

    {"key1"=>"business", "value1"=>"shoes", "key2"=>"date", "value2"=>"2014", "key3"=>"price", "value3"=>"3000"}

In routes file I have written as

    match '/shops/:shop_id/new/:key1/:value1/:key2/:value2/:key3/:value3', :to => 'shops#new'

So in the browser I will type as

    localhost:3000/shops/3/new/business/shoes/date/2014/price/3000

The order of params will not be of same order sometimes. So in the url it can be like

    localhost:3000/shops/3/new/business/shoes/price/3000/date/2014

so that it should retrive corresponding params and assign the values.

So I need to check the corresponding keys and assign values accordingly. That means for eg:

    If params[:key] contains business then value should be assigned as "shoes", if params[:key] is date, then value should be assigned to "2014".etc

How can I achieve it. Please help.

I find it much easier to use the url format ?price=3000&date=2014 then it will all happen for you automatically.

Colin

3

As Colin indicated, you probably shouldn’t do this - there’s already a standard way to pass a hash of named parameters to a web endpoint.

If you’re stuck with this weird URI format, this should work:

hash_params = {}

hash_params[params[:key1]] = params[:value1]

hash_params[params[:key2]] = params[:value2]

hash_params[params[:key3]] = params[:value3]

But seriously, use query parameters if at all possible. Using route params like this means that you’re forced to pass exactly three parameters and means you’re going to be stuck encoding on the client-side into this format, instead of using the built-in stuff for submitting forms…

–Matt Jones