Question

我对rails很新。这必须是一个非常基本的问题，但我无法找到答案。

我的问题：按提交似乎不会更新我的记录。

update_query = 'UPDATE tweets SET favorite_count = ?, retweet_count = ? WHERE id = ?'

for item in parsed[1]:

    # parsed[1][0] = {'favorite_count': 0, 'id': 838564895905964033, 'retweet_count': 229}

    curr_fav_count = item['favorite_count']
    curr_rt_count = item['retweet_count']
    curr_id = item['id']

    c.execute(update_query, (curr_fav_count, curr_rt_count, curr_id))

这是我的.rb文件

<%= simple_form_for(@select_statement) do |f| %>

  <%= render 'form_error', f:f %>

  <div class="form-inputs">
    <%= f.input :title, :label => 'Required: Short title for this sql SELECT statment' %>
    <%= f.input :description, required: false,  :label => 'Optional: Long description of your sql SELECT statment' %>
    <%= f.input :sql_select_statement, :label => 'Required: Your sql SELECT statment' %>
    <%= f.input :user_email %>
    <%= f.input :favorite, :input_html => { :checked => false } %>

      <%= f.button :submit %>
  </div>
<% end %>

现在app / controllers / select_statements_controller.rb

class RalphValidator < ActiveModel::Validator
  def validate(record)
    byebug if ralph_test_byebug
    xyz = 123
  end
end

class EmailValidator < ActiveModel::Validator
  def validate(record)
    # byebug if ralph_test_byebug

    email_regex = /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
    record.errors[:base] << 'email address missing or invalid!!!  Internal system error!!!' unless record.user_email =~ email_regex
    # record.errors[:base] << 'surface mail address missing!!!' unless record.user_email =~ email_regex
    # xyz=123
    # record.errors.add :user_email, 'email address missing!!!' unless record.user_email =~ email_regex
  end
end


class SelectStatement < ActiveRecord::Base
  # See http://api.rubyonrails.org/classes/ActiveModel/Validations/ClassMethods.html
  include ActiveModel::Validations

  attr_accessor :user_email

  before_validation(on: :create) do
    byebug if ralph_test_byebug
    xyz = 123
  end


  validates_with RalphValidator

  validates :sql_select_statement, presence: true
  # validates :user_email, presence: true, email: true
  validates :favorite, inclusion: [true, false]
  byebug if ralph_test_byebug
  validates_with EmailValidator, fields: [:user_email]

  # see http://www.informit.com/articles/article.aspx?p=2220311&seqNum=2
  before_save :ralph_before_save

  def ralph_before_save
    byebug if ralph_test_byebug
    xyz=123
  end


  if true
    def initialize(args)
      byebug if ralph_test_byebug

      # See http://stackoverflow.com/questions/23050181/ruby-class-new-gives-class-not-initialized-error-in-rails-console
      super

      byebug if ralph_test_byebug

      @initialize_args = args           # May be unnecessary
      @user_email = args[:user_email]   # Probably unnecessary

      byebug if ralph_test_byebug
      xyz=123
    end
  end

  if true
    # See http://guides.rubyonrails.org/active_record_callbacks.html#after-initialize-and-after-find

    after_initialize do |s_hash|
      zyx = new_record?

      byebug if ralph_test_byebug

      s_hash[:user_email] = @user_email

      byebug if ralph_test_byebug
      # xyz=123
    end
  end
end

我的基本问题：Rails在哪里将表单的字段插入记录？我试过，例如，before_validate，validates_with，before_save，...

每次我在上面的代码中点击一个byebug断点 - 除了与user_email相关联的属性 - self或@select_statement只是满了nils。

显然，我遗漏了一些非常基本的东西。

Answer 1

因此，令我惊讶的是，Rails 4增加了一个全新的安全功能：强参数。

看起来我期望的行为 - 行属性将自动填充 - 在Rails 4中不再正确，并且必须手动处理行/记录分配。

我发现学习强参数的一个很好的起点是： http://blog.trackets.com/2013/08/17/strong-parameters-by-example.html

这是我的小道信仰。我欢迎评论和纠正。

simple_form_for似乎没有更新记录

1 个答案: