Question

如果#x等于:someday，如何触发true条件？

分贝

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

控制台

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条件都会被触发。我已经尝试过，params[:someday] == "true"，params[:someday] == 1，params[:someday] == "1"，params[:someday] == "t"

Answer 1

你做错了。您应该params[:challenge][:someday]，因为someday位于challenge哈希中。以下代码应该可以使用

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

Answer 2

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

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

会做的伎俩

Answer 3

你的check_box在html中返回1，如果你想要它返回布尔值，那么就像下面这样做。另外，在控制器中，params应该是这样的：params[: challenge][:someday]

<强>形式

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

<强>控制器

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

如果params [：attribute] == true那么做＆＃34; X＆＃34;在控制器？

3 个答案: