Ubuntu上Rails 3.2的奇怪ActiveRecord :: StatementInvalid错误

Question

我是rails新手。我正在研究一个新的铁路项目，这是一个图书馆系统，并试图访问Loan_fines 我收到一个奇怪的错误。

的错误如下： -

ActiveRecord::StatementInvalid in LoanFinesController#index 

PG::Error: ERROR: relation "loan_fines" does not exist 
LINE 5:    WHERE a.attrelid = '"loan_fines"'::regclass 
             ^
:    SELECT a.attname, format_type(a.atttypid, a.atttypmod), 
        pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod 
       FROM pg_attribute a LEFT JOIN pg_attrdef d 
       ON a.attrelid = d.adrelid AND a.attnum = d.adnum 
      WHERE a.attrelid = '"loan_fines"'::regclass 
       AND a.attnum > 0 AND NOT a.attisdropped 
      ORDER BY a.attnum 

我LoanFines控制器如下： -

class LoanFinesController < ApplicationController 
    # GET /loan_fines 
    # GET /loan_fines.json 
    def index 
    @loan_fines = LoanFine.all 

    respond_to do |format| 
     format.html # index.html.erb 
     format.json { render json: @loan_fines } 
    end 
    end 

    # GET /loan_fines/1 
    # GET /loan_fines/1.json 
    def show 
    @loan_fine = LoanFine.find(params[:id]) 

    respond_to do |format| 
     format.html # show.html.erb 
     format.json { render json: @loan_fine } 
    end 
    end 

    # GET /loan_fines/new 
    # GET /loan_fines/new.json 
    def new 
    @loan_fine = LoanFine.new 

    respond_to do |format| 
     format.html # new.html.erb 
     format.json { render json: @loan_fine } 
    end 
    end 

    # GET /loan_fines/1/edit 
    def edit 
    @loan_fine = LoanFine.find(params[:id]) 
    end 

    # POST /loan_fines 
    # POST /loan_fines.json 
    def create 
    @loan_fine = LoanFine.new(params[:loan_fine]) 

    respond_to do |format| 
     if @loan_fine.save 
     format.html { redirect_to @loan_fine, notice: 'Loan fine was successfully created.' } 
     format.json { render json: @loan_fine, status: :created, location: @loan_fine } 
     else 
     format.html { render action: "new" } 
     format.json { render json: @loan_fine.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # PUT /loan_fines/1 
    # PUT /loan_fines/1.json 
    def update 
    @loan_fine = LoanFine.find(params[:id]) 

    respond_to do |format| 
     if @loan_fine.update_attributes(params[:loan_fine]) 
     format.html { redirect_to @loan_fine, notice: 'Loan fine was successfully updated.' } 
     format.json { head :no_content } 
     else 
     format.html { render action: "edit" } 
     format.json { render json: @loan_fine.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /loan_fines/1 
    # DELETE /loan_fines/1.json 
def delete 
    @loan_fine = LoanFine.find(params[:id]) 
    @loan_fine.deleted = 1 
    @loan_fine.save 

    respond_to do |format| 
     format.html { redirect_to loan_fines_url } 
     format.json { render :json => { :success => true } } 
    end 
    end 
end 

我的贷款罚款ID指标如下： -

<h1 class="List">Listing Loan Fines</h1> 

<table class="table table-bordered" > 
    <tr> 
    <th>ID</th> 
    <th>Category Id</th> 
    <th>Loan Duration</th> 
    <th>Book Id</th> 
    <th>Fine Amount</th> 
    <th>Fine Duration</th> 
    <th>Edit</th> 
    <th>Delete</th> 
    </tr> 

<% @loan_fines.each do |c| %> 
    <tr> 
    <td><%= link_to c.id, {:action => 'show', :id => c.id} %> &nbsp;</td> 
    <td><%= c.category_id %>&nbsp;</td> 
    <td><%= c.loan_duration %>&nbsp;</td> 
    <td><%= c.book_id %>&nbsp;</td> 
    <td><%= c.fine_amount %>&nbsp;</td> 
    <td><%= c.fine_duration %>&nbsp;</td> 
    <td><%= link_to 'Edit', {:action => 'edit', :id => c.id} %> &nbsp;</td> 
    <td><%= link_to 'Delete', {:action => 'delete', :id => c.id}, 
    :data => { :confirm => "Are you sure you want to delete this value?" } %></td> 
    </tr> 
<% end %> 
</table> 
<br /> 

<%= link_to 'New Loan fine', new_loan_fine_path %> 

我的日志有以下内容： -

Started GET "/loan_fines" for 127.0.0.1 at 2013-03-29 22:36:37 -0700 
Processing by LoanFinesController#index as HTML 
PG::Error: ERROR: relation "loan_fines" does not exist 
LINE 5:    WHERE a.attrelid = '"loan_fines"'::regclass 
             ^
:    SELECT a.attname, format_type(a.atttypid, a.atttypmod), 
        pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod 
       FROM pg_attribute a LEFT JOIN pg_attrdef d 
       ON a.attrelid = d.adrelid AND a.attnum = d.adnum 
      WHERE a.attrelid = '"loan_fines"'::regclass 
       AND a.attnum > 0 AND NOT a.attisdropped 
      ORDER BY a.attnum 

Completed 500 Internal Server Error in 1ms 

ActiveRecord::StatementInvalid (PG::Error: ERROR: relation "loan_fines" does not exist 
LINE 5:    WHERE a.attrelid = '"loan_fines"'::regclass 
             ^
:    SELECT a.attname, format_type(a.atttypid, a.atttypmod), 
        pg_get_expr(d.adbin, d.adrelid), a.attnotnull, a.atttypid, a.atttypmod 
       FROM pg_attribute a LEFT JOIN pg_attrdef d 
       ON a.attrelid = d.adrelid AND a.attnum = d.adnum 
      WHERE a.attrelid = '"loan_fines"'::regclass 
       AND a.attnum > 0 AND NOT a.attisdropped 
      ORDER BY a.attnum 
): 
    app/controllers/loan_fines_controller.rb:5:in `index' 


    Rendered /home/chiron/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/_trace.erb (5.2ms) 
    Rendered /home/chiron/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (1.0ms) 
    Rendered /home/chiron/.rvm/gems/ruby-1.9.3-p327/gems/actionpack-3.2.11/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (11.3ms) 

我被困在这个。最奇怪的部分是，相同的代码似乎work on windows，但尝试Ubuntu am getting an error。

任何人都可以帮助我这个。

Answer 1

看起来像db错误。首先运行rake db:migrate和rake test:prepare。