TypeError：沒有將nil隱式轉換爲字符串錯誤

我試圖設置我們的CRM系統以在添加特定類型的記錄（列表）時在wordpress中創建帖子。TypeError：沒有將nil隱式轉換爲字符串錯誤

我發現這個tutorial，我正在軌道控制檯中測試它。

我的班級：

require 'rubygems' 
require 'open-uri' 
require 'json' 
require 'net/http' 

# Please note that the vanilla wp-json-api plugin does not support user authentication for create_post. 
# Check out my fork for authentication support: https://github.com/Achillefs/wp-json-api 
class Listing 
    API_URI = 'http://my_wp_url/api/' 
    API_USER = 'my_username' 
    API_PASS = 'my_password' 

    attr_accessor :title, :address, :sell_price, :type 

    def initialize(opts = {}) 
    # set all values if valid 
    opts.each do |key,val| 
     begin 
     self.send(:"#{key}=",val) 
     rescue NoMethodError => e 
     raise ArgumentError("#{key} is not a valid listing attribute") 
     end 
    end 
    self.type = 'post' if self.type == nil 
    end 

    def publish! 
    # Need to get a nonce token from WP in order to create a post 
    nonce_response = JSON.parse(open(API_URI + "get_nonce/?controller=posts&method=create_post").read) 
    if nonce_response['status'] == 'ok' 
     nonce = nonce_response['nonce'] 
     url = URI.parse(API_URI + "posts/create_post") 
     args = { 
     'nonce' => nonce, 'author' => API_USER, 'user_password' => API_PASS, 
     'status' => 'draft', 'title' => self.title 
     } 
     resp, data = Net::HTTP.post_form(url, args) 
     response = JSON.parse(data) 
     if response['status'] == 'ok' 
     puts response.inspect 
     else 
     raise response['error'].to_s 
     end 
    else 
     raise nonce_response['error'].to_s 
    end 

    end 
end

並在控制檯輸出如下

2.0.0-p353 :001 > require 'listing' 
=> true 
2.0.0-p353 :002 > l = Listing.new(:title => "test") 
=> #<Listing:0x007fab9286a2c8 @title="test", @type="post"> 
2.0.0-p353 :003 > l.publish! 
TypeError: no implicit conversion of nil into String 
    from /Users/Nick/.rvm/gems/[email protected]_rails_4_0/gems/json-1.8.1/lib/json/common.rb:155:in `initialize' 
    from /Users/Nick/.rvm/gems/[email protected]_rails_4_0/gems/json-1.8.1/lib/json/common.rb:155:in `new' 
    from /Users/Nick/.rvm/gems/[email protected]_rails_4_0/gems/json-1.8.1/lib/json/common.rb:155:in `parse' 
    from /Users/Nick/rails_projects/wp_api/lib/listing.rb:38:in `publish!' 
    from (irb):3 
    from /Users/Nick/.rvm/gems/[email protected]_rails_4_0/gems/railties-4.0.2/lib/rails/commands/console.rb:90:in `start' 
    from /Users/Nick/.rvm/gems/[email protected]_rails_4_0/gems/railties-4.0.2/lib/rails/commands/console.rb:9:in `start' 
    from /Users/Nick/.rvm/gems/[email protected]_rails_4_0/gems/railties-4.0.2/lib/rails/commands.rb:62:in `<top (required)>' 
    from bin/rails:4:in `require' 
    from bin/rails:4:in `<main>' 
2.0.0-p353 :004 >

38號線是這個

response = JSON.parse(data)

所以我想我得到沒有迴應。我對此相對較新，不確定如何打破原因。

在此先感謝您的幫助。

尼克

來源

2014-01-14 nktokyo

的錯誤是在這條線

resp, data = Net::HTTP.post_form(url, args) 
response = JSON.parse(data)

你假設post_form回報既是響應和數據對象，但它看起來像的data的價值爲零。

檢查內容resp和data。我很確定響應主體包含在resp對象中。

您應該能夠使用去取resp.body

response = JSON.parse(resp.body)

來源

2014-01-14 22:11:30

TypeError：沒有將nil隱式轉換爲字符串錯誤

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