我正在整理我的第一个 Sinatra 应用程序，但我遇到了数据库关系问题。我已经尝试了所有我知道该怎么做的事情（不多），但我仍在摸不着头脑。
这是我不断收到的错误：
<DataObjects::SyntaxError:
ERROR: relation "lovers" does not exist
LINE 1: ...ug", "lover_name", "last_updated", "sidebar"
FROM "lovers" W... ^ (code: 16908420, sql state: 42P01, query:
SELECT "id", "slug", "lover_name", "last_updated", "sidebar"
FROM "lovers"
WHERE "slug" = 'home'
ORDER BY "id"
LIMIT 1,
uri: postgres:localhost/keeprdb?scheme=postgres&user=&password=&host=localhost&port=&path=/keeprdb&query=&fragment=&adapter=postgres)>
这是 Git Hub 信息 github.com/Jonnyread/keepr
对于我如何解决这个问题的任何帮助将不胜感激。
如果您需要我的其他任何东西，请随时询问。
由于我不确定相关代码是什么，所以这里是 application.rb 文件：
require 'rubygems'
require 'sinatra'
require 'sinatra/flash'
require 'dm-core'
require 'dm-validations'
require 'dm-types'
require 'dm-migrations'
require 'dm-postgres-adapter'
require 'rdiscount'
require 'rack-ssl-enforcer'
DataMapper.setup(:default, ENV['DATABASE_URL'] || 'postgres://localhost/keeprdb')
class Lover
include DataMapper::Resource
property :id, Serial
property :slug, String
property :lover_name, String
property :content, Text
property :last_updated, DateTime
property :sidebar, Enum[ :yes, :no ], :default => :no
end
DataMapper.finalize
# Global variables
NAV_TITLE = 'Keepr'
FOOTER = '<em>"This page is maintained by that wild demi-god Jahmed."</em> - <strong>All Praises</strong>'
# Authentication
# use Rack::Auth::Basic, "Restricted Area" do |username, password|
# [username, password] == [username, password]
# end
# Force all connections to use SSL
# use Rack::SslEnforcer
# Converts page into post slug
def slugify(content)
content.downcase.gsub(/ /, '-').gsub(/{^a-z0-9_-}/, '').squeeze('-')
end
# Sets index page as "home"
get '/' do
redirect '/home/'
end
# Creates a new lover from "new lover" form
post '/' do
if params[:userinput].empty?
redirect '/'
else
@lover = Lover.first_or_create(:lover_name => params[:userinput], :slug => slugify(params[:userinput]))
@lover.content = "This is a new lover. Congrats! You should write what you remember about her. That is of course if you remember - you animal."
@lover.last_updated = DateTime.now
@lover.save
flash[:notice] = "Lover created successfully. Hope you're that successful too"
redirect "/#{@lover.slug}/"
end
end
# List all lovers in the database
get '/all/' do
@lover = Lover.new
@lover.lover_name = 'All Lovers'
@lover.slug = 'all'
@lovers = Lover.all
@sidebars = Lover.all(:sidebar => 'yes')
erb :all
end
# Displays requested lover
get '/:url/' do
@lover = Lover.first(:slug => params[:url])
if @lover == nil
flash[:notice] = "That chick don't exist boy."
redirect '/home/'
else
@lovers = Lover.all
@sidebars = Lover.all(:sidebar => 'yes')
erb :show
end
end
# Edits requested note
get '/:url/edit' do
@lover = Lover.first(:slug => params[:url])
@sidebars = Lover.all(:sidebar => 'yes')
erb :edit
end
# Saves user edits to a lover
post '/:url/edit' do
@lover = Lover.first(:slug => params[:url])
@lover.lover_name = params[:lover_name]
@lover.content = params[:content]
@lover.sidebar = params[:sidebar]
@lover.last_updated = DateTime.now
if lover.slug != 'home'
@lover.slug = slugify(params[:lover_name])
end
@lover.save
flash[:notice] = "Change to Lover is saved. Bitch."
redirect "/#{@lover.slug}/"
end
# Readies requested lover for deletion
get '/:url/delete' do
@lover = Lover.first(:slug => params[:url])
@lovers = Lover.all
@sidebars = Lover.all(:sidebar => 'yes')
erb :delete
end
# Deletes specified lover
delete '/:url/delete' do
@lover = Lover.first(:slug => params[:url])
@lover.destroy
flash[:notice] = 'You just dropped that bitch. You should probably go out and find another.'
redirect '/home/'
end
# Redirects user to homepage if a lover is not found
not_found do
flash[:notice] = "Dude, we all know you didn't book that girl. Straight up."
redirect '/home'
end
这是错误所在的部分：
# Displays requested lover
get '/:url/' do
@lover = Lover.first(:slug => params[:url])
if @lover == nil
flash[:notice] = "That chick don't exist boy."
redirect '/home/'
else
@lovers = Lover.all
@sidebars = Lover.all(:sidebar => 'yes')
erb :show
end
end
这是 Rakefile：
require 'rubygems'
require 'sinatra'
require 'sinatra/flash'
require 'dm-core'
require 'dm-validations'
require 'dm-types'
require 'dm-migrations'
require 'dm-postgres-adapter'
require 'rdiscount'
require 'rack-ssl-enforcer'
DataMapper.setup(:default, ENV['DATABASE_URL'] || 'postgres://localhost/keeprdb')
class Lover
include DataMapper::Resource
property :id, Serial
property :slug, String
property :lover_name, String
property :content, Text
property :last_updated, DateTime
property :sidebar, Enum[ :yes, :no ], :default => :no
end
DataMapper.auto_migrate!
task :setup do
@lover = Lover.create(:slug => 'home')
@lover.slug = 'home'
@lover.lover_name = 'Home'
@lover.content = 'This is the beginning of the next step my man. -Jahmed'
@lover.last_updated = DateTime.now
@lover.sidebar = :no
@lover.save
end
希望这可以帮助。
再次感谢你的帮助。