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Nil 对象的活动模型序列化程序问题

[英]Active Model Serializer issue for Nil object

原文 2020-03-15 01:51:32 2 1 ruby-on-rails/ ruby/ active-model-serializers

ActiveModelSerializers::SerializableResource.new(object.project, include: [collaborator: :pictures]).as_json[:project]

When object.project is nil then it occurs an issue.当 object.project 为 nil 时，就会出现问题。 NoMethodError: undefined method `[]' for nil:NilClass NoMethodError: 未定义方法 `[]' 为 nil:NilClass

1 个解决方案

It's not related to ActiveModelSerializers (AMS) after all.毕竟它与 ActiveModelSerializers (AMS) 无关。 In Ruby, nil causes a lot of NoMethodError , so we often avoid nil s with if or unless modifiers.在 Ruby 中， nil会导致很多NoMethodError ，因此我们经常避免使用if或unless修饰符nil 。 For example, in your case, we often do ActiveModelSerializers::SerializableResource.new(object.project, include: [collaborator: :pictures]).as_json[:project] if object.project例如，在你的情况下，我们经常做ActiveModelSerializers::SerializableResource.new(object.project, include: [collaborator: :pictures]).as_json[:project] if object.project

活动模型序列化器嵌套关联无问题 - Active model serializer nested association nil issue

Active Model序列化程序不使用序列化程序 - Active Model Serializer use no serializer

带参数的活动模型序列化程序？ - active model serializer with parameter?

Active Model Serializer，每个型号都有不同的串行器 - Active Model Serializer with different serializer for each model

活动模型序列化器-自定义响应 - Active Model Serializer - Customizing Response

包括与活动模型序列化器的关联 - Including association to active model serializer

带有Active Model Serializer的Namespacing API - Namespacing API with Active Model Serializer

活动模型序列化程序未按预期工作 - Active Model Serializer not working as expected

主动模型序列化器扁平结构 - active model serializer flat structure

包括与 Active Model Serializer 的关联 - Include an association with Active Model Serializer

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相关问题 活动模型序列化器嵌套关联无问题 - Active model serializer nested association nil issue Active Model序列化程序不使用序列化程序 - Active Model Serializer use no serializer 带参数的活动模型序列化程序？ - active model serializer with parameter? Active Model Serializer，每个型号都有不同的串行器 - Active Model Serializer with different serializer for each model 活动模型序列化器-自定义响应 - Active Model Serializer - Customizing Response 包括与活动模型序列化器的关联 - Including association to active model serializer 带有Active Model Serializer的Namespacing API - Namespacing API with Active Model Serializer 活动模型序列化程序未按预期工作 - Active Model Serializer not working as expected 主动模型序列化器扁平结构 - active model serializer flat structure 包括与 Active Model Serializer 的关联 - Include an association with Active Model Serializer

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