我正在尝试学习 Ruby on Rails,但遇到了需要帮助的问题。我想要做的是用表格创建一个“项目经理”,但是当我填写表格并点击提交时,会显示以下错误:
ActiveRecord::StatementInvalid in ProjectsController#create
SQLite3::ConstraintException: constraint failed: INSERT INTO "projects" ("created_at", "description", "end_date", "start_date", "title", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?, ?)
Rails.root: /Applications/XAMPP/xamppfiles/htdocs/IDV450-labb1
Application Trace | Framework Trace | Full Trace
app/controllers/projects_controller.rb:14:in `create'
项目负责人:
1. class ProjectsController < ApplicationController
2.
3. def index
4. @projects = Project.all
5. end
6.
7. def new
8. @project = Project.new
9. end
10.
11. def create
12. @project = Project.new(params[:project].merge(:user_id => current_user.id))
13.
14. if @project.save
15. redirect_to projects_path
16. else
17. render :action => "new"
18. end
19. end
20. end
项目模型:
class Project < ActiveRecord::Base
has_and_belongs_to_many :users
belongs_to :ticket
attr_accessible :user_id, :title, :description, :start_date, :end_date
end
新项目的视图:
<%= form_for @project do |f| %>
<div class="text_field">
<%= f.label :title%>
<%= f.text_field :title%>
</div>
<div class="text_field">
<%= f.label :description%>
<%= f.text_field :description%>
</div>
<div class="dropdown">
<%= f.label :start_date%>
<%= date_select :start_date, :startdate %>
</div>
<div class="dropdown">
<%= f.label :end_date%>
<%= date_select :end_date, :enddate %>
</div>
<div class="select">
<%= f.label :title%>
</div>
<div class="submit">
<%= f.submit "Save" %>
</div>
<% end %>
数据库模型:
Project:
- id: int
- user_id: int
- title: varchar(50)
- description: varchar(500)
- start_date: date
- end_date: date
- created_at: datetime
- updated_at: datetime
发送的请求参数:
{"utf8"=>"✓",
"authenticity_token"=>"CrFUjpsRCEWRprSmKtOk4nBxsxrwaII1WKLDWMQWuUI=",
"project"=>{"title"=>"Foo project",
"description"=>"A little description"},
"start_date"=>{"start_date(1i)"=>"2013",
"start_date(2i)"=>"2",
"start_date(3i)"=>"7"},
"end_date"=>{"end_date(1i)"=>"2014",
"end_date(2i)"=>"3",
"end_date(3i)"=>"12"},
"commit"=>"Spara"}
它真的没有说问题是什么,但是当它尝试保存到数据库时它发生在第 14 行。如果我在种子中创建一个项目,它就可以工作!