应为Lab，已获取字符串

Question

我喜欢案例模型。案例模型有3个字段作为实验室模型的id。

in Case模型

belongs_to :lab1, foreign_key: 'lab1', class_name: 'Lab', inverse_of: :lab1, conditions: {step1: true}
belongs_to :lab2, foreign_key: 'lab2', class_name: 'Lab', inverse_of: :lab2, conditions: {step2: true}
belongs_to :lab3, foreign_key: 'lab3', class_name: 'Lab', inverse_of: :lab3, conditions: {step3: true}

在实验模型中

has_many :lab1, foreign_key: 'lab1', class_name: 'Case', inverse_of: :lab1
has_many :lab2, foreign_key: 'lab2', class_name: 'Case', inverse_of: :lab2
has_many :lab3, foreign_key: 'lab3', class_name: 'Case', inverse_of: :lab3

以及在case veiw中的形式

 .lab_group
   = f.association :lab1, label: false, input_html: {'data-placeholder'=> t('step.one')}
   = f.input :lab1_delivered, label: t('case.done')
 .lab_group
   = f.association :lab2, label: false, input_html: {'data-placeholder'=> t('step.two')}
   = f.input :lab2_delivered, label: t('case.done')
.lab_group
   = f.association :lab3, label: false, input_html: {'data-placeholder'=> t('step.three')}
   = f.input :lab3_delivered, label: t('case.done')

但当我尝试保存它时，我弄错了

Lab(#70207759169540) expected, got String(#70207716712320)

并请求参数

{"utf8"=>"✓",
 "authenticity_token"=>"G0BWY6V6tkxRt81I0ZOxKXs8RD/7cdfbZfhVfRTmboo=",
 "case"=>{"number"=>"123",
 "doctor_id"=>"1",
 "lab1"=>"1",
 "lab1_delivered"=>"0",
 "lab2"=>"2",
 "lab2_delivered"=>"0",
 "lab3"=>"2",
 "lab3_delivered"=>"0",
 "delivered"=>"0",
 "patient"=>"",
 "comment"=>"for example"},
 "commit"=>"Save"}

和屏幕

​

​

​

我怎么才能修复它？

Answer 1

解决方案：

我的cases表中有lab1、lab2、lab3列。但是foreign_key没有看到。我更改了lab1、lab2和lab3的名称，比如lab1_id、lab2_id和lab3_id。

我从关联中删除了foreign_key。

让我们看看。

in case模型

belongs_to :lab1, class_name: 'Lab', inverse_of: :lab1, conditions: {step1: true}
belongs_to :lab2, class_name: 'Lab', inverse_of: :lab2, conditions: {step2: true}
belongs_to :lab3, class_name: 'Lab', inverse_of: :lab3, conditions: {step3: true}

在实验模型中

has_many :lab1, class_name: 'Case', inverse_of: :lab1
has_many :lab2, class_name: 'Case', inverse_of: :lab2
has_many :lab3, class_name: 'Case', inverse_of: :lab3

在形式上

.lab_group
  = f.association :lab1, label: false, input_html: {'data-placeholder'=> t('step.one')}
  = f.input :lab1_delivered, label: t('case.done')
.lab_group
  = f.association :lab2, label: false, input_html: {'data-placeholder'=> t('step.two')}
  = f.input :lab2_delivered, label: t('case.done')
.lab_group
  = f.association :lab3, label: false, input_html: {'data-placeholder'=> t('step.three')}
  = f.input :lab3_delivered, label: t('case.done')

foreign_key不工作:(它是错误吗？也许是吧。

Answer 2

我认为您在这里使用的名称是lab1，lab2，lab3，而不是lab1_id，lab2_id，lab3_id作为foreign_keys名称。