如果参数[：属性] == true，那么在控制器中"X"吗？

Question

如果:someday等于true，如何触发#x条件？

.db

t.boolean  "someday"

控制器

# In new.html.erb user inputs challenge.name and can checkmark challenge.someday
def new
  @challenge = Challenge.new
end
# If user checkmarks someday than do x otherwise do y (keep in mind conditional is triggered before challenge is created)
def create
  if params[:someday] == true
    #x
  else
    #y
  end
end

安慰

Started POST "/challenges" for 127.0.0.1 at 2016-06-03 14:04:01 -0400
Processing by ChallengesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"Ii3RdJYAnOpT/OOkqVA74b8YD5suUA3Rf4Wegih65xSSU0r1c5DB0UCJVWcGcid3JtSt6fjzmfYpbWZtf2Dm/A==", "challenge"=>{"someday"=>"1", "name"=>"test"}, "button"=>""}
  User Load (0.5ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = $1 LIMIT 1  [["id", 15]]
  Rendered shared/_error_messages.html.erb (0.2ms)
  Rendered challenges/create.html.erb within layouts/application (48.5ms)

现在，无论我如何调整params[:someday] == true #y条件都会不断被触发。我试过，params[:someday] == "true"，params[:someday] == 1，params[:someday] == "1"，params[:someday] == "t"

Answer 1

你做错了。您应该执行params[:challenge][:someday]，因为someday位于challenge哈希内。下面的代码应该可以工作

def create
  if params[:challenge][:someday] == "1"
    #x
  else
    #y
  end
end

Answer 2

应该

params[:challenge][:someday] params[:someday]，因为您提交的值来自表单

def create
  if params[:challenge][:someday]
    #x
  else
    #y
  end
end

会做这个伎俩

Answer 3

你在 html 中的check_box返回 1 ，如果你想让它返回布尔值，那就像下面这样做。此外，在控制器中参数应该像这样：params[: challenge][:someday]

形式

<%= f.check_box :someday, {}, true , false %>

控制器

def create
  if params[: challenge][:someday]
    #x
  else
    #y
  end
end