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Ruby级间通信(Ruby inter class communication)

 我遇到了开发一个项目的奇怪困难。 我没有足够的课程经验所以这就是我在这里问的原因。 我有一个用一个参数初始化的类，我需要其他类来调用该类函数，但我不能直到该类被初始化，所以我问我怎么能这样做。  
 以下是我所谈论的一些例子：  
class AVR
    def initialize(device)
        @device = device
        @avr_conf = YAML::load(File.open("./devices/#{device}.yaml"))
    end

    def avr_conf
        return @avr_conf
    end
end

class IO
    def setMode(a,b)
        "#{AVR.avr_conf[a]} = #{b}"
    end
end

I met strange difficulty developing one project. I dont have enough experience with classes so this is why I ask here. I have one class which is initialized with one parameter and I need other classes to call that class functions but I cant until that class is initialized so I asking how I could do that. 
Here is some example what I talking about: 
class AVR
    def initialize(device)
        @device = device
        @avr_conf = YAML::load(File.open("./devices/#{device}.yaml"))
    end

    def avr_conf
        return @avr_conf
    end
end

class IO
    def setMode(a,b)
        "#{AVR.avr_conf[a]} = #{b}"
    end
end

原文：https://stackoverflow.com/questions/8898372

更新时间：2023-10-06 13:10

最满意答案

 您可以覆盖SaveChanges以查找DbEntityValidationException的改进验证消息。  
 1.在与EDMX所在位置相同的位置创建新的部分类。  
 2.使用以下C＃代码覆盖SaveChanges实现。  
public partial class NorthwindEntities
{
public override int SaveChanges()
{
    try
    {
        return base.SaveChanges();
    }
    catch (DbEntityValidationException ex)
    {
        // Retrieve the error messages as a list of strings.
        var errorMessages = ex.EntityValidationErrors
                .SelectMany(x => x.ValidationErrors)
                .Select(x => x.ErrorMessage);

        // Join the list to a single string.
        var fullErrorMessage = string.Join("; ", errorMessages);

        // Combine the original exception message with the new one.
        var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);

        // Throw a new DbEntityValidationException with the improved exception message.
        throw new DbEntityValidationException(exceptionMessage, ex.EntityValidationErrors);
    }
}
}
 
 有关详细信息，请参阅此链接： http ： //devillers.nl/improving-dbentityvalidationexception/ 

You can override SaveChanges to find improved validation message of DbEntityValidationException. 
1.Create a new partial class in the same location as where your EDMX resides. 
2.Use the following piece of C# code to override the SaveChanges implementation. 
public partial class NorthwindEntities
{
public override int SaveChanges()
{
    try
    {
        return base.SaveChanges();
    }
    catch (DbEntityValidationException ex)
    {
        // Retrieve the error messages as a list of strings.
        var errorMessages = ex.EntityValidationErrors
                .SelectMany(x => x.ValidationErrors)
                .Select(x => x.ErrorMessage);

        // Join the list to a single string.
        var fullErrorMessage = string.Join("; ", errorMessages);

        // Combine the original exception message with the new one.
        var exceptionMessage = string.Concat(ex.Message, " The validation errors are: ", fullErrorMessage);

        // Throw a new DbEntityValidationException with the improved exception message.
        throw new DbEntityValidationException(exceptionMessage, ex.EntityValidationErrors);
    }
}
}
 
Refer this link for more details : http://devillers.nl/improving-dbentityvalidationexception/

Ruby级间通信(Ruby inter class communication)

最满意答案

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