Question

我有以下迁移：

    create_table :flows do |t|
      t.string :name
      t.belongs_to :subject, index: true
      t.timestamps
    end

我的架构：

create_table "flows", force: :cascade do |t|
    t.string   "name"
    t.integer  "subject_id"
    t.index ["subject_id"], name: "index_flows_on_subject_id"
end
create_table "subjects", force: :cascade do |t|
    t.string   "subject"
    t.datetime "created_at", null: false
end

在我的表格中，我有选择html：

<%= f.select :subject, Subject.all.collect {|s| [ s.subject, s.id ] }, {prompt: 'Select subject'}, class:"form-control" %>

但它显示错误：主题（＃30363600）预期，得到字符串（＃16228440）

# POST /flows.json
  def create
    @flow = Flow.new(flow_params)

    respond_to do |format|
      if @flow.save

参数：

{"utf8"=>"✓",
 "authenticity_token"=>"y3cTmsdqweqioXtsCpSlNtmTonyXev+67emGwqfgvGJK4D3Szt1FbZcxe6M7QU8cLYPEbanmkYngzyDvbFPw==",
 "flow"=>{"name"=>"Create Project", "subject"=>"11"},
 "button"=>""}

Answer 1

您有一个名为subject_id的列，请尝试以下操作：

<%= f.select :subject_id, Subject.all.collect {|s| [ s.subject, s.id ] }, {prompt: 'Select subject'}, class:"form-control" %>

Strong Param应如下所示：

def flow_params
 params.require(:flow).permit(:name, :subject_id)
end

错误 - 预期主题，得到字符串

1 个答案: