如何在Rails 3和Postgres中處理大整數

使用rails 3.2.3，ruby 1.9.3和postgres 8.4.12（在RHEL 6.3上）的Im。我希望試圖從控制器保存該記錄時，IP地址存儲在數據庫中的整數，但出現以下錯誤：如何在Rails 3和Postgres中處理大整數

def create 
    @network = Network.new(params[:network]) 

    @network.address_int = IPAddr.new(@network.address_str).to_i 
    @network.netmask_int = IPAddr.new(@network.netmask_str).to_i 

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

我收到以下錯誤

我的遷移定義本欄目爲8字節整數：

class CreateNetworks < ActiveRecord::Migration 
    def change 
    create_table :networks do |t| 
     t.integer :vlan 
     t.integer :address_int, :limit => 8  
     t.integer :netmask_int, :limit => 8 
     t.string :address_str 
     t.string :netmask_str 
     t.string :desc 

     t.timestamps 
    end 
    end 
end

但我已經能夠這樣大整數存儲在軌道控制檯：

1.9.3p125 :001 > n=Network.new 
=> #<Network id: nil, vlan: nil, address_int: nil, address_str: nil, netmask_int: nil, netmask_str: nil, desc: nil, created_at: nil, updated_at: nil> 
1.9.3p125 :002 > n.address_int=4294967040 
=> 4294967040 
1.9.3p125 :003 > n 
=> #<Network id: nil, vlan: nil, address_int: 4294967040, address_str: nil, netmask_int: nil, netmask_str: nil, desc: nil, created_at: nil, updated_at: nil> 
1.9.3p125 :004 > n.save 
(0.2ms) BEGIN 
    SQL (5.0ms) INSERT INTO "networks" ("address_int", "address_str", "created_at", "desc", "netmask_int", "netmask_str", "updated_at", "vlan") VALUES ($1, $2, $3, $4, $5, $6, $7, $8) RETURNING "id" [["address_int", 4294967040], ["address_str", nil], ["created_at", Tue, 10 Jul 2012 15:09:37 UTC +00:00], ["desc", nil], ["netmask_int", nil], ["netmask_str", nil], ["updated_at", Tue, 10 Jul 2012 15:09:37 UTC +00:00], ["vlan", nil]] 
(0.9ms) COMMIT 
=> true

那麼，這個bigint數據類型應該定義在別的地方嗎？提前致謝。

來源

2012-07-11 Sirch

任何理由不使用字符串？ – AJcodez 2012-07-11 09:28:01

是的，Id而不是存儲一個點分十進制整數作爲一個字符串。我會在上面做數學運算，並將它存儲爲一個字符串，只是感覺很髒。 – Sirch 2012-07-11 09:34:38

http://stackoverflow.com/questions/10055499/how-do-you-run-rails-runner-in-heroku – PriteshJ 2012-07-11 11:24:48

如果您升級到PG 9.1，您可以使用他們的本地IP address/Subnet/MAC address types。你甚至可以在你的遷移中使用它們postgres_ext gem。這應該自動處理任何類型的IP地址，而不必將它們轉換爲BIGINT或STRING，並允許一些令人敬畏的技巧，如「從*選擇相同的子網」

來源

2012-07-21 15:41:32 thoughtpunch

如何在Rails 3和Postgres中處理大整數

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