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Filtering parameters (Basic)
class UsersController < ApplicationController
def index
respond_to do |format|
format.html do
render html: "Hello #{ user_params[:name] } user_params[:sentence]"
end
end
end
private
def user_params
if params[:name] == "john"
params.permit(:name, :sentence)
else
params.permit(:name)
end
end
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We can allow (or reject) some params so that only what we want will pass through and you won't have bad surprises like user setting options not meant to be changed.