欄種子不正確的列順序

我正嘗試種子從csv文件稱爲國家表。其他種子按照我指定的順序工作，但是這是按照字母順序生成INSERT語句，該語句不能正確映射到csv文件中的字段。表國家有一個主鍵約束，但沒有序列或默認值。我已經調用了rake db：schema：dump，以防萬一架構無法順利運行。有任何想法嗎？欄種子不正確的列順序

型號

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

樣品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

錯誤

$ 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)

來源

2013-03-15 Michael

我建議你註釋掉國家對象的創建並首先檢查你所得到的值是否正確。我使用了你的示例文件，並使用與你類似的代碼運行它。沒有錯誤。但是，由於您以不同的順序獲取價值（例如，您可能獲取名稱而不是縮寫 - 因此是錯誤）。你甚至可以先寫一個簡單的ruby腳本來讀取這個文件並打印這些值。其次，您可以使用csv module這是一個標準的ruby模塊來處理來自csv文件的數據。

來源

2013-03-16 03:09:04 Salil

對於我來說，這個問題留給我的機器或非常糟糕的狀態軌實例。我不得不重新啓動整臺機器，而不僅僅是導軌服務器。

來源

2013-03-15 13:10:10 Michael

欄種子不正確的列順序

回答

相關問題