在設計模型AJAX調用中的Rails4 422（Unprocessable Entity）

我有一個form_for使用AJAX來更新我添加到設計用戶模型的自定義字段。但是，在提交（有效輸入）後，我得到一個POST 422（不可處理實體）錯誤。這是因爲低於我的用戶模型驗證的：在設計模型AJAX調用中的Rails4 422（Unprocessable Entity）

class User < ActiveRecord::Base 
    validates_presence_of :annual_income, :current_savings, :retirement_savings, :if => :enable_strict_validation 
    validates_numericality_of :annual_income, :current_savings, :retirement_savings, :if => :enable_strict_validation 

    # Include default devise modules. Others available are: 
    # :confirmable, :lockable, :timeoutable and :omniauthable 
    devise :database_authenticatable, :registerable, 
    :recoverable, :rememberable, :trackable, :validatable 
end

下面的形式：

<div class="main_form"> 
    <h1>Income & Savings First...</h1> 
    <%= form_for @user, url: { action: :persist_data }, method: :post, remote: true, html: { id: "insurance_form" } do |f| %> 
    <%= f.label "Total Annual Income" %> 
    <%= f.text_field :annual_income, autofocus: true, placeholder: "Enter $" ,value: "", class: "format_me" %><br/> 
    <%= f.label "Savings" %> 
    <%= f.text_field :current_savings, placeholder: "Enter $", value: "", class: "format_me" %><br/> 
    <%= f.label "Saved for Retirement?" %> 
    <%= f.text_field :retirement_savings, placeholder: "Enter $", value: "", class: "format_me" %><br/> 
    <%= f.submit "Calculate", class: "btn btn-primary" %> 
    <% end %> 
</div>

呼叫被下面的HomeController中提出：

class HomeController < ApplicationController 
    before_filter :authenticate_user! 

    def index 
    @user = current_user 
    end 

    # TODO: refactor as update in a custom devise controller for user 
    def persist_data 
    user_params.each {|key, val| val.gsub!("$", "") } 
    # Make sure user model validations are run 
    current_user.enable_strict_validation = true 
    current_user.save! 
    current_user.update_attributes(user_params) 
    render json: {status: "OK"} 
    end 

    private 

    def user_params 
    params.require(:user).permit(:annual_income, :current_savings, :retirement_savings, :recommended_insurance) 
    end 
end

最後，這裏是服務器日誌與錯誤：

Started POST "/home/persist_data" for 127.0.0.1 at 2014-03-12 12:11:34 -0400 
Processing by HomeController#persist_data as JS 
    Parameters: {"utf8"=>"✓", "user"=>{"annual_income"=>"$4.00", "current_savings"=>"$4.00", "retirement_savings"=>"$4.00"}, "commit"=>"Calculate"} 
    User Load (0.2ms) SELECT "users".* FROM "users" WHERE "users"."id" = 2 ORDER BY "users"."id" ASC LIMIT 1 
    (0.1ms) begin transaction 
    (0.1ms) rollback transaction 
Completed 422 Unprocessable Entity in 35ms 

ActiveRecord::RecordInvalid (Validation failed: Annual income can't be blank, Annual income is not a number, Current savings can't be blank, Current savings is not a number, Retirement savings can't be blank, Retirement savings is not a number): 
    app/controllers/home_controller.rb:13:in `persist_data'

感謝您的幫助。

來源

2014-03-12 i_trope

更新persist_data如下：

def persist_data 
    ## Set the user_params value 
    user_params = user_params.each {|key, val| val.gsub!("$", "") } 
    # Make sure user model validations are run 
    current_user.enable_strict_validation = true 
    ## Remove below line, as you are updating in the very next line with user_params 
    ## current_user.save!   
    current_user.update_attributes(user_params) 
    render json: {status: "OK"} 
    end

來源

2014-03-12 16:38:09

所以驗證只在這個動作來看，我已經包括current_user.enable_strict_validation = true，所以除去這將是一個問題。 –

我要求刪除current_user.save！而不是current_user.enable_strict_validation = true＃ –

由於您尚未在current_user中設置要更新的值（例如'annual_income'，'current_savings'等），所以'current_user .save！'必然會導致驗證錯誤。當你執行'current_user.update_attributes（user_params）'時，你傳遞'user_params'，所以你不會得到任何驗證錯誤。 –

在設計模型AJAX調用中的Rails4 422（Unprocessable Entity）

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