zhaopei (赵配)

mac 上安装 therubyracer -v '0.12.2' 安装问题

zhaopei — Fri, 01 Apr 2016 19:07:50 +0800

mac 上安装 therubyracer 0.12.2 依赖于 libv8 3.16.14.13 安装日志如下： Building native extensions. This could take a while... ERROR: Error installing therubyracer: ERROR: Failed to build gem native extension.

current directory: /usr/local/lib/ruby/gems/2.3.0/gems/therubyracer-0.12.2/ext/v8 /usr/local/opt/ruby/bin/ruby -r ./siteconf20160401-35470-1bzsbrk.rb extconf.rb checking for main() in -lpthread... yes checking for main() in -lobjc... yes checking for v8.h... yes checking for main() in -lv8... yes creating Makefile

To see why this extension failed to compile, please check the mkmf.log which can be found here:

/usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/therubyracer-0.12.2/mkmf.log

current directory: /usr/local/lib/ruby/gems/2.3.0/gems/therubyracer-0.12.2/ext/v8 make "DESTDIR=" clean

current directory: /usr/local/lib/ruby/gems/2.3.0/gems/therubyracer-0.12.2/ext/v8 make "DESTDIR=" compiling accessor.cc clang: warning: argument unused during compilation: '-rdynamic' In file included from accessor.cc:1: In file included from ./rr.h:4: /usr/local/include/v8.h:360:33: error: use of undeclared identifier 'nullptr' V8_INLINE MaybeLocal() : val_(nullptr) {} ^ /usr/local/include/v8.h:367:51: error: use of undeclared identifier 'nullptr' V8_INLINE bool IsEmpty() const { return val_ == nullptr; } ^ /usr/local/include/v8.h:371:29: error: use of undeclared identifier 'nullptr' out->val_ = IsEmpty() ? nullptr : this->val_; ^ /usr/local/include/v8.h:437:50: error: use of undeclared identifier 'nullptr' bool IsFirstPass() const { return callback_ != nullptr; } ^ /usr/local/include/v8.h:808:42: error: use of undeclared identifier 'nullptr' V8_INLINE Global() : PersistentBase(nullptr) {} ^ /usr/local/include/v8.h:833:18: error: use of undeclared identifier 'nullptr' other.val_ = nullptr; ^ /usr/local/include/v8.h:845:18: error: use of undeclared identifier 'nullptr' rhs.val_ = nullptr; ^ /usr/local/include/v8.h:1110:52: error: use of undeclared identifier 'nullptr' ScriptOrigin* origin = nullptr)); ^ /usr/local/include/v8.h:1113:30: error: use of undeclared identifier 'nullptr' ScriptOrigin* origin = nullptr); ^ /usr/local/include/v8.h:3242:36: error: use of undeclared identifier 'nullptr' return NewInstance(context, 0, nullptr); ^ /usr/local/include/v8.h:4457:57: error: use of undeclared identifier 'nullptr' experimental::FastAccessorBuilder* fast_handler = nullptr, ^ /usr/local/include/v8.h:4473:57: error: use of undeclared identifier 'nullptr' experimental::FastAccessorBuilder* fast_handler = nullptr); ^ /usr/local/include/v8.h:7292:27: error: use of undeclared identifier 'nullptr' if (V8_UNLIKELY(val_ == nullptr)) V8::ToLocalEmpty(); ^ In file included from accessor.cc:1: ./rr.h:358:39: error: no member named 'ScriptData' in namespace 'v8' class ScriptData : public Pointerv8::ScriptData { ~~^ ./rr.h:358:51: error: expected class name class ScriptData : public Pointerv8::ScriptData { ^ ./rr.h:360:21: error: no type named 'ScriptData' in namespace 'v8'; did you mean simply 'ScriptData'? inline ScriptData(v8::ScriptData* d) : Pointerv8::ScriptData(d) {}; ^~~~~~~~~~~~ ScriptData ./rr.h:358:7: note: 'ScriptData' declared here class ScriptData : public Pointerv8::ScriptData { ^ ./rr.h:360:54: error: no member named 'ScriptData' in namespace 'v8' inline ScriptData(v8::ScriptData* d) : Pointerv8::ScriptData(d) {}; ~~~~^ ./rr.h:360:65: error: expected class member or base class name inline ScriptData(v8::ScriptData* d) : Pointerv8::ScriptData(d) {}; ^ ./rr.h:360:65: error: expected '{' or ',' fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated. make: *** [accessor.o] Error 1

make failed, exit code 2

Gem files will remain installed in /usr/local/lib/ruby/gems/2.3.0/gems/therubyracer-0.12.2 for inspection. Results logged to /usr/local/lib/ruby/gems/2.3.0/extensions/x86_64-darwin-15/2.3.0/therubyracer-0.12.2/gem_make.out

Rails 中用 Mongoid 的 map_reduce 中 float 类型相加问题，

zhaopei — Thu, 03 Dec 2015 18:20:42 +0800

 map = %Q{
      function() {
        emit(this.userinfo.id, {totalPrice: this.paycost, profit: this.profit, count: 1})
      }
    }
    mapStatistic = %Q{
      function() {
        emit(this.userinfo_id, {totalPrice: this.total_price, profit: this.profit, count: 1})
      }
    }
    reduce = %Q{
      function(key, values) {
        profit = 0.0;
        income = 0.0;
        count = 0;
        incomes = []
        profits = []
        values.forEach(function(value) {
           income += value.totalPrice;
           profit += value.profit;
           count += value.count;
        });
        return {profit: profit, income: income, count: count}
      }
    }

statistics = OrderStatistic.where({:complete_date => {"$gte" => startDate, "$lte" => endDate}, :userinfo_id => @current_user.userinfo.id}).map_reduce(mapStatistic, reduce).out(:inline => true)
Rails.logger.info "0000000statistic=======#{statistics.inspect}==sCount=#{sCount}"

日志打印出来是 1111111statistic======={"_id"=>"564a90a903d0b85d0a000000", "value"=>{"profit"=>38110.0, "income"=>NaN, "count"=>499.0}} income => NaN 如何 total_price 小数点保留 2 位的相加后有问题，profit 也是 float，小数点后面没有有效位没有问题。

ActiveResource 如何接合 Devise 认证

zhaopei — Tue, 01 Dec 2015 11:37:03 +0800

activeResource 要映射远程的 model，但是远程的控制器有 devise 的认证，如何处理？

Faker 如何自定义本地语言文件？或者覆盖原来的语言文件

zhaopei — Wed, 28 Oct 2015 18:35:35 +0800

github 的文档中这样写：

Customization

Since you may want to make addresses and other types of data look different depending on where in the world you are (US postal codes vs. UK postal codes, for example), Faker uses the I18n gem to store strings (like state names) and formats (US postal codes are NNNNN while UK postal codes are AAN NAA), allowing you to get different formats by switching locales. Just set Faker::Config.locale to the locale you want, and Faker will take care of the rest.

If your locale doesn't already exist, create it in the \lib\locales\ directory and you can then override or add elements to suit

en-au-ocker: faker: name: # Existing faker field, new data first_name: [Charlotte, Ava, Chloe, Emily] # New faker fields ocker_first_name: [Bazza, Bluey, Davo, Johno, Shano, Shazza] region: [South East Queensland, Wide Bay Burnett, Margaret River, Port Pirie, Gippsland, Elizabeth, Barossa]

我在本地的 config/environments/test.rb 中加入了 Faker::Config.locale = 'zh-HK' 然后创建 lib/locales/zh-HK.yml 文件 zh-HK.yml 文件如下图执行 rails console test 后

显示是 zh-HK，但是生成的 name 是英文的，不知道什么原因？

ActiveResource 已经不更新了，现在换成其他的什么了？

zhaopei — Tue, 27 Oct 2015 18:57:13 +0800

activeResource 用的人可不少，现在都不更新，又换成其他新的 gem 包了，还是？

在 RailsGuides 里有个 Active Record Query Interface 的一个问题

zhaopei — Tue, 06 Oct 2015 16:28:32 +0800

页面里有个这样的写法

Client.where("orders_count = ?", params[:orders])

我在调用时却显示

ArgumentError: wrong number of arguments (2 for 1)
    from /usr/local/lib/ruby/gems/2.2.0/gems/mongoid-5.0.0/lib/mongoid/criteria.rb:449:in `where'
    from (eval):2:in `where'
    from (irb):23

什么原因？，怎么用代？的传递参数，