我怎样包括使用Swashbuckle扬鞭API文档中的子类? [英] How do I include subclasses in Swagger API documentation using Swashbuckle?
问题描述
我在C#中Asp.Net的Web API 5.2项目,并生成文档与Swashbuckle。
I have an Asp.Net web API 5.2 project in c# and generating documentation with Swashbuckle.
我有一个包含继承像从动物抽象类,狗和猫类,从中获得具有动物属性模型。
I have model that contain inheritance something like having an Animal property from an Animal abstract class and Dog and Cat classes that derive from it.
Swashbuckle只显示了动物类的架构,所以我试着用ISchemaFilter(他们有什么建议太),但我不能让它工作,我也无法找到一个合适的例子。
Swashbuckle only shows the schema for the Animal class so I tried to play with ISchemaFilter (that what they suggest too) but I couldn't make it work and also I cannot find a proper example.
任何人都可以帮忙吗?
Anybody can help?
推荐答案
这似乎Swashbuckle不正确地实现多态性与我明白笔者看有关的子类作为参数的点(如果一个动作expectes的动物类和行为不同,如果你与狗对象或猫对象调用它,那么你应该有2个不同的动作..)但返回类型,我相信这是正确的返回动物和物体可能是狗或猫的类型。
It seems Swashbuckle doesn't implement polymorphism correctly and I understand the point of view of the author about subclasses as parameters (if an action expectes an Animal class and behave differently if you call it with a dog object or a cat object, then you should have 2 different actions..) but as return types I believe that it is correct to return Animal and the objects could be Dog or Cat types.
所以来形容我的API,并产生具有正确guidlines(注意我描述disciminator的方式,如果你有自己的鉴别,你可能需要更改特别是一部分)行适当的JSON模式中,我使用的文件和模式滤波器如下:
So to describe my API and produce a proper JSON schema in line with correct guidlines (be aware of the way I describe the disciminator, if you have your own discriminator you may need to change that part in particular), I use document and schema filters as follow:
SwaggerDocsConfig configuration;
.....
configuration.DocumentFilter<PolymorphismDocumentFilter<YourBaseClass>>();
configuration.SchemaFilter<PolymorphismSchemaFilter<YourBaseClass>>();
.....
public class PolymorphismSchemaFilter<T> : ISchemaFilter
{
private readonly Lazy<HashSet<Type>> derivedTypes = new Lazy<HashSet<Type>>(Init);
private static HashSet<Type> Init()
{
var abstractType = typeof(T);
var dTypes = abstractType.Assembly
.GetTypes()
.Where(x => abstractType != x && abstractType.IsAssignableFrom(x));
var result = new HashSet<Type>();
foreach (var item in dTypes)
result.Add(item);
return result;
}
public void Apply(Schema schema, SchemaRegistry schemaRegistry, Type type)
{
if (!derivedTypes.Value.Contains(type)) return;
var clonedSchema = new Schema
{
properties = schema.properties,
type = schema.type,
required = schema.required
};
//schemaRegistry.Definitions[typeof(T).Name]; does not work correctly in SwashBuckle
var parentSchema = new Schema { @ref = "#/definitions/" + typeof(T).Name };
schema.allOf = new List<Schema> { parentSchema, clonedSchema };
//reset properties for they are included in allOf, should be null but code does not handle it
schema.properties = new Dictionary<string, Schema>();
}
}
public class PolymorphismDocumentFilter<T> : IDocumentFilter
{
public void Apply(SwaggerDocument swaggerDoc, SchemaRegistry schemaRegistry, System.Web.Http.Description.IApiExplorer apiExplorer)
{
RegisterSubClasses(schemaRegistry, typeof(T));
}
private static void RegisterSubClasses(SchemaRegistry schemaRegistry, Type abstractType)
{
const string discriminatorName = "discriminator";
var parentSchema = schemaRegistry.Definitions[SchemaIdProvider.GetSchemaId(abstractType)];
//set up a discriminator property (it must be required)
parentSchema.discriminator = discriminatorName;
parentSchema.required = new List<string> { discriminatorName };
if (!parentSchema.properties.ContainsKey(discriminatorName))
parentSchema.properties.Add(discriminatorName, new Schema { type = "string" });
//register all subclasses
var derivedTypes = abstractType.Assembly
.GetTypes()
.Where(x => abstractType != x && abstractType.IsAssignableFrom(x));
foreach (var item in derivedTypes)
schemaRegistry.GetOrRegister(item);
}
}
在previous code农具指定什么这里,在部分机型。多态性支持它基本上会产生类似以下内容:
What the previous code implements is specified here, in the section "Models with Polymorphism Support. It basically produces something like the following:
{
"definitions": {
"Pet": {
"type": "object",
"discriminator": "petType",
"properties": {
"name": {
"type": "string"
},
"petType": {
"type": "string"
}
},
"required": [
"name",
"petType"
]
},
"Cat": {
"description": "A representation of a cat",
"allOf": [
{
"$ref": "#/definitions/Pet"
},
{
"type": "object",
"properties": {
"huntingSkill": {
"type": "string",
"description": "The measured skill for hunting",
"default": "lazy",
"enum": [
"clueless",
"lazy",
"adventurous",
"aggressive"
]
}
},
"required": [
"huntingSkill"
]
}
]
},
"Dog": {
"description": "A representation of a dog",
"allOf": [
{
"$ref": "#/definitions/Pet"
},
{
"type": "object",
"properties": {
"packSize": {
"type": "integer",
"format": "int32",
"description": "the size of the pack the dog is from",
"default": 0,
"minimum": 0
}
},
"required": [
"packSize"
]
}
]
}
}
}
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