栏种子不正确的列顺序

我正尝试种子从csv文件称为国家表。其他种子按照我指定的顺序工作，但是这是按照字母顺序生成INSERT语句，该语句不能正确映射到csv文件中的字段。表国家有一个主键约束，但没有序列或默认值。我已经调用了rake db：schema：dump，以防万一架构无法顺利运行。有任何想法吗？栏种子不正确的列顺序

型号

class Country < ActiveRecord::Base 
    attr_accessible :id, :name, :abbreviation, :area, :population, :internet_users, :last_updated 
end

schema.rb

create_table "countries", :id => false, :force => true do |t| 
    t.integer "id",       :null => false 
    t.string "name",   :limit => 50, :null => false 
    t.string "abbreviation", :limit => 5, :null => false 
    t.integer "area" 
    t.integer "population" 
    t.integer "internet_users" 
    t.datetime "last_updated" 
    end

样品CSV

1,Afghanistan,AF,"645,807","30,419,928","1,520,996",6/12/2013 
2,Albania,AL,"28,748","2,986,952","1,441,928",12/11/2013 
3,Algeria,DZ,"2,381,741","34,586,184","4,700,000",6/10/2013 
4,American Samoa,AS,197,"67,242","3,040",3/11/2013

seeds.rb

@seedfilepath = "#{Rails.root}/db/seedfiles/" 
Country.delete_all 
open(@seedfilepath + "countries.csv") do |records| 
    records.read.each_line do |record| 
    id, name, abbreviation, area, population, internet_users, last_updated = record.chomp.split(',') 
    @country = Country.create!(id: id, name: name, abbreviation: abbreviation, area: area, population: population, internet_users: internet_users, last_updated: last_updated) 
    end 
end

错误

$ rake db:seed 
rake aborted! 
PG::Error: ERROR: value too long for type character varying(5) 
: INSERT INTO "countries" ("abbreviation", "area", "id", "internet_users", "last_updated", "name", "population") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id" 
C:/Users/mmoore/Documents/rubyapps/visitdays/db/seeds.rb:14:in `block (2 levels) in <top (required)>' 
C:/Users/mmoore/Documents/rubyapps/visitdays/db/seeds.rb:12:in `each_line' 
C:/Users/mmoore/Documents/rubyapps/visitdays/db/seeds.rb:12:in `block in <top (required)>' 
C:/Users/mmoore/Documents/rubyapps/visitdays/db/seeds.rb:11:in `<top (required)>' 
Tasks: TOP => db:seed 
(See full trace by running task with --trace)

来源

2013-03-15 Michael

我建议你注释掉国家对象的创建并首先检查你所得到的值是否正确。我使用了你的示例文件，并使用与你类似的代码运行它。没有错误。但是，由于您以不同的顺序获取价值（例如，您可能获取名称而不是缩写 - 因此是错误）。你甚至可以先写一个简单的ruby脚本来读取这个文件并打印这些值。其次，您可以使用csv module这是一个标准的ruby模块来处理来自csv文件的数据。

来源

2013-03-16 03:09:04 Salil

对于我来说，这个问题留给我的机器或非常糟糕的状态轨实例。我不得不重新启动整台机器，而不仅仅是导轨服务器。

来源

2013-03-15 13:10:10 Michael

栏种子不正确的列顺序

回答

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