Hypertable遷移導致導軌問題2.3.8

Question

我使用Hypertable數據庫與HyperRecord的前端。我修復了一些錯誤。但是現在遷移困住了我。當我做移植它顯示錯誤：

rake aborted! 
undefined method `select_rows' for #<ActiveRecord::ConnectionAdapters::HypertableAdapter:0xb6f791c4> 
.rvm/gems/ruby-1.8.7-p352@r2.3.8/gems/activerecord-2.3.8/lib/active_record/connection_adapters/abstract/database_statements.rb:27:in `select_values' 

當我看着軌道上的代碼或ruby actice_record。表明。

# Returns an array of arrays containing the field values. 
    # Order is the same as that returned by +columns+. 
    def select_rows(sql, name = nil) 
    end 
    undef_method :select_rows 

我試圖通過在初始化中添加修復來刪除這些函數。

module ActiveRecord 
    module ConnectionAdapters 
    class HypertableAdapter 

     def select_rows(sql, name = nil) 
     end 
    end 
    end 
end 

然後纔出現了錯誤Nil value occurred while accepting array or hash。爲了解決它，我給修復代碼添加了新的方法。

module ActiveRecord 
    module ConnectionAdapters 
    class HypertableAdapter 

     def select_rows(sql, name = nil) 
     end 

     def select_values(sql, name = nil) 
     result = select_rows(sql, name) 
     result.map { |v| v[0] } unless result.nil? 
     end 
    end 
    end 
end 

然後纔出現了錯誤：

rake aborted! 
You have a nil object when you didn't expect it! 
You might have expected an instance of Array. 
The error occurred while evaluating nil.map 
/.rvm/gems/ruby-1.8.7-p352@r2.3.8/gems/activerecord-2.3.8/lib/active_record/migration.rb:421:in `get_all_versions' 

是否有任何人有一個想法，這是怎麼回事呢？

Answer 1

此代碼刪除所有錯誤。但是現在遷移運行良好，但不會回滾。

module ActiveRecord 
    module ConnectionAdapters 
    class HypertableAdapter 

     def select_rows(sql, name = nil) 
     result = execute(sql) 
     rows = [] 
     result.cells.each { |row| rows << row } 
     rows 
     end 

     def select_values(sql, name = nil) 
     result = select_rows(sql, name) 
     result.map { |v| v[0] } unless result.nil? 
     end 
    end 
    end 
end 

當我住進模式文件它顯示了以下錯誤：

# Could not dump table "teams" because of following StandardError 
# Unknown type '' for column 'ROW'