Rails加入收集不識別參數

Question

我試圖在名爲Interventions的連接表中創建一條記錄。基本上在我的應用程序中，用戶可以對事件進行多種干預，事件可以由許多用戶進行干預。我傳遞了所需的強參數，但是當我試圖保存時，應用程序會出現以下錯誤：「事件必須存在」和「用戶必須存在」。我花了數小時的時間，並無法弄清楚問題所在。你能幫我麼？我張貼相關的代碼在這裏：

user.rb (model) 
    has_many :interventions 
    has_many :incidents, through: :interventions 

incident.rb (model) 
    has_many :interventions 
    has_many :users, through: :interventions 

intervention.rb (model) 
    belongs_to :incident_priority 
    belongs_to :intervention_status 

interventions_controller.rb

def new 

    @incident = Incident.find(params[:incident]) 
    @user = User.find(current_user.id) 
    @intervention = Intervention.new(:user_id => @user, :incident_id => @incident) 

    @project = @incident.channel.project 
    @mirth = Mirth.find_by server_id: @incident.mirth_server_id 
end 


def create 
    @incident = Incident.find(params[:incident_id]) 
    @user = User.find(params[:user_id]) 
    @intervention = Intervention.create(intervention_params) 

    @project = @incident.channel.project 
    @mirth = Mirth.find_by server_id: @incident.mirth_server_id 

    respond_to do |format| 
    if @intervention.save 
     format.html { redirect_to new_intervention_path(@incident), notice: 'Intervention was successfully created.' } 
     format.json { render :show, status: :created, location: @intervention } 
    else 
     format.html { render :new, incident: :incident_id } 
     format.json { render json: @intervention.errors, status: :unprocessable_entity } 
    end 
    end 
end 

<....> 

def intervention_params 
    params.require(:intervention).permit(:user_id, :incident_id, :incident_priority_id, :begin_date, :end_date, :description, 
             :intervention_status_id, :forwarded_to) 
end 

在我看來（interventions_form.html.erb）：

<%= form_for(@intervention) do |f| %> 
<% if @intervention.errors.any? %> 
    <div id="error_explanation"> 
     <h2><%= pluralize(@intervention.errors.count, "error") %> prohibited this intervention from being saved:</h2> 

     <ul> 
     <% @intervention.errors.full_messages.each do |message| %> 
      <li><%= message %></li> 
     <% end %> 
     </ul> 
    </div> 
<% end %> 

<div class="form-group form-inline"> 

    <%= hidden_field_tag :user_id, @user.id %> 
    <%= hidden_field_tag :incident_id, @incident.id %> 

    <strong>Interveniente:</strong> 
    <%= @user.first_name %> <%= @user.last_name %> 

</div> 

<div class="form-group form-inline"> 
    <%= f.label 'Prioridade' %> 
    <%= f.collection_select :incident_priority_id, IncidentPriority.all, :id, :description, {}, {class: "form-control"} %> 
</div> 

<div class="form-group form-inline"> 
    <%= f.label 'Data início intervenção' %> 
    <%= f.datetime_select :begin_date %> 
</div> 

<div class="form-group form-inline"> 
    <%= f.label 'Data fim intervenção' %> 
    <%= f.datetime_select :end_date, :include_blank => true %> 
</div> 

<div class="form-group form-inline"> 
    <%= f.label 'Observações' %> 
    <%= f.text_area :description %> 
</div> 

<div class="form-group form-inline"> 
    <%= f.label 'Estado' %> 
    <%= f.collection_select :intervention_status_id, InterventionStatus.all, :id, :description, {}, {class: "form-control"} %> 
</div> 

<div class="form-group form-inline"> 
    <%= f.label 'Encaminhado para:' %> 
    <%= f.text_area :forwarded_to %> 
</div> 

<div class="actions" align="right"> 
    <%= link_to 'Voltar', incidents_path(:mirth => @mirth, :project => @project), class: "btn btn-info" %> 
    <%= f.submit "Gravar", class: "btn btn-info" %> 
</div> 

我運行調試和值在hidden_​​field_tags中正確填充。同樣在控制器中，@user和@incident已正確填充，但@intervention在外鍵中沒有：user_id和：incident_id。

在此先感謝！

Answer 1

您需要將用戶和事件與干預相關聯。

模型中的

...

class Intervention 
    belongs_to :user 
    belongs_to :incident 

在創建方法

...

def create 
    @incident = Incident.find(params[:incident_id]) 
    @user = User.find(params[:user_id]) 
    @intervention = Intervention.create(intervention_params) 
    @intervention.incident = @incident 
    @intervention.user = @user 
    ... 

Answer 2

您需要更改此：

def create 
    @incident = Incident.find(params[:incident_id]) 
    @user = User.find(params[:user_id]) 

    # ... 
end 

對於這一點：

def create 
    @incident = Incident.find(params[:incident_id]) 
    @user = User.find(params[:user_id]) 
    intervention_params.merge(user_id: @user.id, incident_id: @incident.id) 

    # ... 
end 

而且你的模型：

class Intervention 
    belongs_to :user 
    belongs_to :incident