Rails - instance variable does not preserve value

Question

I have a Portfolio scaffold. From the update method of the controller, I am calling the show view. However, a variable (@weights) that I am instantiating in the controller does not preserve its value.

Controller:

@weights = @portfolio.compute_weights
pp "in the controller, the weights are #{@weights}"
format.html { redirect_to @portfolio, notice: 'Portfolio was successfully updated.' }
format.json { render :show, status: :ok, location: @portfolio }

View

<% pp "in the view, the weights are #{@weights}"%>

The output is

"in the controller, the weights are {\"Bitcoin\"=>1.0, \"Litecoin\"=>0.0}"
"in the view, the weights are "

Why is this happening?

Put this in your view file <%= debug @weights%> and let me know what you are getting — rick
– rick, Commented May 25, 2015 at 14:28

Amit Badheka · Accepted Answer · 2015-05-25 14:31:13Z

1

You are redirecting to a different controller when in format.html block.

All the initialized variables are lost, if we redirect to another controller method.

answered May 25, 2015 at 14:31

Amit Badheka

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2 Comments

bsky Over a year ago

Is there any way of storing a hash for every record?

Amit Badheka Over a year ago

can you ask it as a different question??

rick · Accepted Answer · 2015-05-25 14:25:41Z

0

Change pp to = and try like this,

<%= "in the view, the weights are #{@weights}"%>

answered May 25, 2015 at 14:25

rick

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