Question

我对rails很新，我正在尝试创建一个小应用程序。我有2个表客户端和项目。我有一个jqgrid表，我用来尝试添加项目。我的表单请求项目表的信息，插入后我希望它通过缩写（CLIENT_NM）找到client_id。现在，当插入行时，clients表中的外键值输入为NULL。如何使用client_nm来使用rails更新外表（如果密钥存在）。

The clients table Modes:
class Client < ActiveRecord::Base
  database_connection = Rails.env
  establish_connection database_connection.to_sym
  self.table_name = 'clients'
  has_many :projects, :inverse_of => :client
  #attr_accessible :client_number, :client_mnemonic, :client_name, :client_location
end

实际表格：

SQL> desc clients
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID                                        NOT NULL NUMBER(38)
 CLIENT_MNEMONIC                                    VARCHAR2(255 CHAR)
 CLIENT_NUMBER                                      NUMBER(38)
 CLIENT_NAME                                        VARCHAR2(255 CHAR)
 CLIENT_LOCATION                                    VARCHAR2(255 CHAR)
 CREATED_AT                                         DATE
 UPDATED_AT                                         DATE

项目表：

class Project < ActiveRecord::Base
  database_connection = Rails.env
  establish_connection database_connection.to_sym
  self.table_name = 'projects'
  belongs_to :client, :inverse_of => :project
  #attr_accessible :client_number, :client_mnemonic, :client_name, :client_location
end

实际项目表

SQL> desc projects
 Name                                      Null?    Type
 ----------------------------------------- -------- ----------------------------
 ID                                        NOT NULL NUMBER(38)
 CLIENT_ID                                          NUMBER(38)
 CLIENT_NM                                          VARCHAR2(255 CHAR)
 PROJECT_NAME                                       VARCHAR2(255 CHAR)
 PROJECT_STATUS                                     VARCHAR2(255 CHAR)
 PROJECT_START                                      DATE
 PROJECT_END                                        DATE
 PROJECT_TYPE                                       VARCHAR2(255 CHAR)
 PROJECT_PLAN                                       VARCHAR2(255 CHAR)
 PROJECT_DESC                                       VARCHAR2(4000 CHAR)
 CREATED_AT                                         DATE
 UPDATED_AT                                         DATE

控制器（snippit）：

  if params[:id] == "_empty"
    Project.create(:client_id => params[:client_id],
                   :client_nm => params[:client_nm].upcase,
                   :project_name => params[:project_name],
                   :project_status => params[:project_status],
                   :project_start  => params[:project_start].to_date,
                   :project_end => params[:project_end].to_date,
                   :project_type => params[:project_type],
                   :project_plan => params[:project_plan],
                   :project_desc => params[:project_desc])

也可能有助于显示jqgrid帖子表单数据：

colModel:[
{name:'id',index:'id', hidden:true},
{name:'client_id',index:'client_id', hidden:true},
{name:'client_nm',index:'client_nm', firstsortorder:"asc", width:25,editable:true,editoptions:{size:8}},
{name:'project_name',index:'project_name', width:60, align:"left",editable:true,editoptions:{size:16}},
{name:'project_status',index:'project_status', width:60, align:"left",editable:true,editoptions:{size:16}},
{name:'project_start',index:'project_start', width:60, align:"left",editable:true,editoptions:{size:16,
       dataInit: function(element) {$(element).datepicker({dateFormat: 'yy.mm.dd'})}
}},
{name:'project_end',index:'project_end', width:60, align:"left",editable:true,editoptions:{size:16,
       dataInit: function(element) {$(element).datepicker({dateFormat: 'yy.mm.dd'})}
}},
{name:'project_type',index:'project_type', width:60, align:"left",editable:true,editoptions:{size:16}},
{name:'project_plan',index:'project_plan', width:60, align:"left",editable:true,editoptions:{size:16}},
{name:'project_desc',index:'project_desc', width:60, align:"left",editable:true,editoptions:{size:16}},
{name:'created_at',index:'created_at', hidden:true},
{name:'updated_at',index:'updated_at', hidden:true}
],

我认为我需要（在sudo代码中）

Project.create(:client_id => find(client_by_client_nm(params[:client_nm].upcase),

或类似的东西。我真的不确定魔法是如何发生在这里的。任何帮助将不胜感激。

Answer 1

所以这可能是一个黑客攻击，但我知道我将永远只能获得一条记录

      if params[:id] == "_empty"
    Project.create(:client_id => Client.where(client_mnemonic: params[:client_nm].upcase).pluck(:id)[0],
...

希望这有助于某人。

在rails 4中自动添加外键值

1 个答案: