编辑：将错误缩小到我尝试通过回形针上传图像时
好的，所以只是尝试添加/编辑我的数据库的元素，这些元素在heroku上启动并开始出错。检查了heroku日志得到了这个
2012-08-23T19:10:42+00:00 app[web.1]: Completed 500 Internal Server Error in 363ms
2012-08-23T19:10:42+00:00 app[web.1]:
2012-08-23T19:10:42+00:00 app[web.1]: NoMethodError (undefined method `[]' for nil:NilClass):
2012-08-23T19:10:42+00:00 app[web.1]: app/controllers/apartments_controller.rb:68:in `new'
2012-08-23T19:10:42+00:00 app[web.1]: app/controllers/apartments_controller.rb:68:in `create'
如果我查看apt控制器第68行的内容，我就明白了......
def create
@apartment = Apartment.new(params[:apartment])
不确定为什么这会导致错误，直到很久以前它一直工作得很好，如果有人能帮助它，那就不胜感激了。
新观点：
<div id="new"><center><h1>New apartment</h1>
<%= render 'form' %>
<br />
<%= link_to 'Back', apartments_path %></center>
</div>
_形式查看：
<div id="formApt">
<%= form_for @apartment, :html => { :multipart => true } do |f| %>
<% if @apartment.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(@apartment.errors.count, "error") %> prohibited this apartment from being saved:</h2>
<ul>
<% @apartment.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :agent %><br />
<%= f.collection_select :agent, Apartment::AGENTS, :to_s, :to_s,
:include_blank => true %><br />
</div>
<div class="field">
<%= f.label :location %><br />
<%= f.text_field :location %><br />
</div>
<div class="field">
<%= f.label :availability %><br />
<%= f.collection_select :availability, Apartment::AVAILSEL, :to_s, :to_s,
:include_blank => true %><br />
</div>
<div class="field">
<%= f.label :Bed %><br />
<%= f.number_field :Bed %><br />
</div>
<div class="field">
<%= f.label :Bath %><br />
<%= f.number_field :Bath %><br />
</div>
<div class="field">
<%= f.label :Rent %><br />
<%= f.text_field :Rent %><br />
</div>
<div class="field">
<%= f.label :Pets %><br />
<%= f.collection_select :Pets, Apartment::PETSSEL, :to_s, :to_s,
:include_blank => true %><br />
</div>
<div class="field">
<%= f.label :Security_Deposit %><br />
<%= f.text_field :Security_Deposit %><br />
</div>
<div class="field">
<%= f.label :Parking %><br />
<%= f.text_field :Parking %><br />
</div>
<div class="field">
<%= f.label :Laundry %><br />
<%= f.collection_select :Laundy, Apartment::LAUNDRYSEL, :to_s, :to_s,
:include_blank => true %><br />
</div>
<div class="field">
<%= f.label :Owner %><br />
<%= f.text_field :Owner %><br />
</div>
<div class="field">
<%= f.label :Date_Avail %><br />
<%= f.date_select :Date_Avail %><br />
</div>
<div class="field">
<%= f.label :Type_Heat %><br />
<%= f.collection_select :Type_Heat, Apartment::HEATSEL, :to_s, :to_s,
:include_blank => true %><br />
</div>
<div class="field">
<%= f.label :AC %><br />
<%= f.collection_select :AC, Apartment::ACSEL, :to_s, :to_s,
:include_blank => true %><br />
</div><br />
<div class="field">
<%= f.file_field :photo %><br />
<%= f.file_field :photo2 %><br />
<%= f.file_field :photo3 %><br />
<%= f.file_field :photo4 %><br />
</div>
<div class="field">
<%= f.label :Description %><br />
<%= text_area "apartment", "description", "cols" => 60, "rows" => 10 %><br />
</div>
<div class="actions">
<%= f.submit %>
</div>
<div class="field">
<% f.fields_for :apartment_image do |apartment| %>
<% if apartment.object.new_record? %>
<p>
<%= apartment.label :caption, "Image Caption" %>
<%= apartment.text_field :caption %>
</p>
<p>
<% end %>
</p>
</div>
<% end %><% end %>
</div>
显示视图
<head>
<!-- First, add jQuery (and jQuery UI if using custom easing or animation -->
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/jquery-ui.min.js"></script>
<%= javascript_include_tag "jquery.timers-1.2" %>
<%= javascript_include_tag "jquery.easing.1.3" %>
<%= javascript_include_tag "jquery.galleryview-3.0-dev" %>
<%= stylesheet_link_tag "jquery.galleryview-3.0-dev", :media => "all" %>
<!-- Lastly, call the galleryView() function on your unordered list(s) -->
<script type="text/javascript">
$(function(){
$('#myGallery').galleryView({
transition_speed: 2000, //INT - duration of panel/frame transition (in milliseconds)
transition_interval: 4000, //INT - delay between panel/frame transitions (in milliseconds)
easing: 'swing', //STRING - easing method to use for animations (jQuery provides 'swing' or 'linear', more available with jQuery UI or Easing plugin)
show_panels: true, //BOOLEAN - flag to show or hide panel portion of gallery
show_panel_nav: false, //BOOLEAN - flag to show or hide panel navigation buttons
enable_overlays: true, //BOOLEAN - flag to show or hide panel overlays
panel_width: 900, //INT - width of gallery panel (in pixels)
panel_height: 500, //INT - height of gallery panel (in pixels)
panel_animation: 'slide', //STRING - animation method for panel transitions (crossfade,fade,slide,none)
panel_scale: 'crop', //STRING - cropping option for panel images (crop = scale image and fit to aspect ratio determined by panel_width and panel_height, fit = scale image and preserve original aspect ratio)
overlay_position: 'bottom', //STRING - position of panel overlay (bottom, top)
pan_images: true, //BOOLEAN - flag to allow user to grab/drag oversized images within gallery
pan_style: 'drag', //STRING - panning method (drag = user clicks and drags image to pan, track = image automatically pans based on mouse position
pan_smoothness: 15, //INT - determines smoothness of tracking pan animation (higher number = smoother)
start_frame: 1, //INT - index of panel/frame to show first when gallery loads
show_filmstrip: true, //BOOLEAN - flag to show or hide filmstrip portion of gallery
show_filmstrip_nav: true, //BOOLEAN - flag indicating whether to display navigation buttons
enable_slideshow: false, //BOOLEAN - flag indicating whether to display slideshow play/pause button
autoplay: false, //BOOLEAN - flag to start slideshow on gallery load
show_captions: true, //BOOLEAN - flag to show or hide frame captions
filmstrip_size: 3, //INT - number of frames to show in filmstrip-only gallery
filmstrip_style: 'scroll', //STRING - type of filmstrip to use (scroll = display one line of frames, scroll filmstrip if necessary, showall = display multiple rows of frames if necessary)
filmstrip_position: 'bottom', //STRING - position of filmstrip within gallery (bottom, top, left, right)
frame_width: 164, //INT - width of filmstrip frames (in pixels)
frame_height: 80, //INT - width of filmstrip frames (in pixels)
frame_opacity: 0.5, //FLOAT - transparency of non-active frames (1.0 = opaque, 0.0 = transparent)
frame_scale: 'crop', //STRING - cropping option for filmstrip images (same as above)
frame_gap: 5, //INT - spacing between frames within filmstrip (in pixels)
show_infobar: true, //BOOLEAN - flag to show or hide infobar
infobar_opacity: 1 //FLOAT - transparency for info bar
});
});
</script>
<style type="text/css">
body {
margin: 2em;
font-family: Arial, Helvetica, sans-serif;
}
</style>
</head>
<body>
<div id="new"><br /><br /><br /><br /><br /><br /><br /><br />
<br /><br />
<ul id="myGallery">
<li> <%= image_tag @apartment.photo.url (:large) %>
<li> <%= image_tag @apartment.photo2.url (:large) %>
<li> <%= image_tag @apartment.photo3.url (:large) %>
<li> <%= image_tag @apartment.photo4.url (:large) %>
</ul>
<p>
<b>Agent:</b>
<%= @apartment.agent %>
</p>
<p>
<b>Location:</b>
<%= @apartment.location %>
</p>
<p>
<b>Availability:</b>
<%= @apartment.availability %>
</p>
<p>
<b>Bed:</b>
<%= @apartment.Bed %>
</p>
<p>
<b>Bath:</b>
<%= @apartment.Bath %>
</p>
<p>
<b>Rent:</b>
$<%= @apartment.Rent %>
</p>
<p>
<b>Pets:</b>
<%= @apartment.Pets %>
</p>
<p>
<b>Security deposit:</b>
$<%= @apartment.Security_Deposit %>
</p>
<p>
<b>Parking:</b>
<%= @apartment.Parking %>
</p>
<p>
<b>Laundy:</b>
<%= @apartment.Laundy %>
</p>
<p>
<b>Owner:</b>
<%= @apartment.Owner %>
</p>
<p>
<b>Date avail:</b>
<%= @apartment.Date_Avail %>
</p>
<p>
<b>Type heat:</b>
<%= @apartment.Type_Heat %>
</p>
<p>
<b>Ac:</b>
<%= @apartment.AC %>
</p>
<p>
<b>Description:</b>
<%= @apartment.description %>
</p>
<center>
<nav2>
<span id="home2"> <%= link_to image_tag("home.png"), root_url %></span>
<span id="apartments2"><%= link_to image_tag("apartments.png"), {:action =>'aptMenu', :controller => 'apartments'} %></span>
<a href="http://livewellchicago.herokuapp.com/?cat=forms"> <%= image_tag("forms.png") %> </a>
<a href="http://livewellchicago.herokuapp.com/?cat=landlords">
<%= image_tag("landlords.png")%> </a>
<a href="http://livewellchicago.herokuapp.com/?cat=contactUs">
<%= image_tag("contactus.png") %> </a>
</nav2>
</div>
</body>
PARAMS：
{"commit"=>"Create Apartment",
"apartment"=>{"Laundy"=>"In Building",
"availability"=>"RENTED",
"Owner"=>"mike",
"Date_Avail(1i)"=>"2012",
"Date_Avail(2i)"=>"8",
"agent"=>"Jason Gold",
"Security_Deposit"=>"1200",
"Date_Avail(3i)"=>"23",
"Rent"=>"3232",
"Bed"=>"3232",
"Type_Heat"=>"Radiator",
"location"=>"ewew",
"Bath"=>"32323",
"Pets"=>"Cats Only",
"Parking"=>"no",
"AC"=>"Window Unit",
"photo"=>#<ActionDispatch::Http::UploadedFile:0x103e34c80 @content_type="image/jpeg",
@tempfile=#<File:/var/folders/bg/dnbp4t6s12g5bh3_yrj6ntvr0000gn/T/RackMultipart20120823-62841-rogrlw-0>,
@headers="Content-Disposition: form-data; name=\"apartment[photo]\"; filename=\"livingroom.jpg\"\r\nContent-Type: image/jpeg\r\n",
@original_filename="livingroom.jpg">,
"description"=>"description goes here"},
"authenticity_token"=>"3KhQ0Bh3D+DZSTbPPPhWmgJLqTQ7HyOx45Coa23N4mI=",
"utf8"=>"✓"}
答案 0 :(得分：1)
好吧，所以基本上这是我自己的错。与公寓模型和has_attached_file语句的格式有关
has_attached_file :photo, :styles => {:small => "150x150>", :large => "800x720>", :convert_options => { :all => '-auto-orient' }}
essentually：convert_options部分导致图像的参数为nil，这阻止了任何东西被添加到数据库中（除非你避免添加图片）。但感谢普鲁斯万的帮助！
答案 1 :(得分：0)