我将如何解决这个问题？

Question

我正在使用以下内容尝试写入 yaml 文件

class NoteDB
    attr_reader :data

    def initialize(file)
        @file = file
        if File.exists?(@file)
            @data = YAML.load_file(@file)
        else
            puts "Warning: note db #{@file} does not exist. Skipping loading."
            @data = Hash.new
        end
    end
    def data=(newdata)
        @data = newdata
        #f = File.open(@file, 'w')
        #YAML.dump(@data, f)
        File.write(@file, @data.to_yaml)
        #f.close
    end
end

接下来的几位是每个命令的设置方法

class NotePlugin 
    include Cinch::Plugin
    def set_netnote(m, network, note)
        return unless m.channel == "#channel"
        data = $netnotedb.data
        network.downcase!
        data[network] = note
        m.reply "Note for #{network} has been set."
        $netnotedb.data = data
    end
    def add_cat(m, category)
        return unless m.channel == "#channel"
        category.downcase!
        data = $notedb.data
        if data.has_key? category
            m.reply "#{Format(:bold, "Error:")} Category \"#{category}\" exists."
        else
            data[category] = Array.new
            $notedb.data = data
            m.reply "Category \"#{category}\" added."
        end
    end
    def del_cat(m, category)
        return unless m.channel == "#channel"
        category.downcase!
        data = $notedb.data
        if data.has_key? category
            data.delete category
            $notedb.data = data
            m.reply "Category \"#{category}\" removed."
        else
            m.reply "#{Format(:bold, "Error:")} Category \"#{category}\" does not exist."
        end
    end
    def add_item(m, cat, item)
        return unless m.channel == "#channel"
        cat.downcase!
        data = $notedb.data
        if data.has_key? cat
            data[cat] << item
            $notedb.data = data
            m.reply "Item added."
        else
            m.reply "#{Format(:bold, "Error:")} Category \"#{cat}\" does not exist."
        end
    end
    def del_item(m, cat, index)
        return unless m.channel == "#channel"
        cat.downcase!
        index = index.to_i - 1
        data = $notedb.data
        if data.has_key? cat
            if data[cat][index].nil?
                m.reply "#{Format(:bold, "Error:")} Item ##{index + 1} not found."
            else
                data[cat].delete data[cat][index]
                $notedb.data = data
                m.reply "Deleted item ##{index + 1}."
            end
        else
            m.reply "#{Format(:bold, "Error:")} Category \"#{cat}\" does not exist."
        end
    end
end

该插件会因 []= 未定义而出错，或者将退出而没有任何错误或任何操作。

也有人说要使用block类型的write，我试过了，但还是不行。

get_netnote 有效，其余无效，我似乎无法弄清楚原因。

Answer 1

class NoteDB
    attr_reader :data
    def initialize(file)
        @file = file
        if File.exists?(@file)
            @data = YAML.load_file(@file)
        else
            puts "Warning: note db #{@file} does not exist. Skipping loading."
            @data = Hash.new
        end
    end
    def data=(newdata)
        @data = newdata
        #f = File.open(@file, 'w')
        #File.write(@file, @data.to_yaml)
        File.open(@file,'w') do |f|
            f.write YAML.dump(@file) + @data.to_yaml
        end
    end
end

f.write YAML.dump(@file) + @data.to_yaml 是其中的关键，其中@file 是 yaml 文件的装饰器/变量，转储文件，将 @data 添加到 yaml 中，然后写入。