[BUG] [dart-dio-next] Models inside anyOf missing type information

#### Bug Report Checklist

- [x ] Have you provided a full/minimal spec to reproduce the issue?
- [x] Have you validated the input using an OpenAPI validator ([example](https://apidevtools.org/swagger-parser/online/))?
- [x ] Have you [tested with the latest master](https://github.com/OpenAPITools/openapi-generator/wiki/FAQ#how-to-test-with-the-latest-master-of-openapi-generator) to confirm the issue still exists?
- [x] Have you searched for related issues/PRs?
- [x] What's the actual output vs expected output?
- [ ] [Optional] Sponsorship to speed up the bug fix or feature request ([example](https://github.com/OpenAPITools/openapi-generator/issues/6178))

##### Description

When a model has a parameter of type allOf with only one child type, specific type information about that type is lost and it is parsed as a generic model.

For example if we have a model **User** with a field **type**, which is defined as allOf and then a inner type enum:

```
      "User": {
        "type": "object",
        "properties": {
          "type": {
            "allOf": [
              {
                "$ref": "#/components/schemas/UserType"
              }
            ],
            "description": "type of user"
          }
        }
      },
      "UserType": {
        "type": "string",
        "title": "UserType",
        "enum": [
          "admin",
          "user"
        ]
      }
```

The model definition of **UserType** below has `"isEnum": true`, but the variable/field definition of **UserType** in **User** model definition has `"isEnum": false` and `"isModel": true`.

This model is an enum and `"isEnum" should always be true.

<details>
  <summary>Debug model output</summary>
```
[
  {
    "importPath": "lib.src.model.User",
    "model": {
      "anyOf": [],
      "oneOf": [],
      "allOf": [],
      "anyOfProps": [],
      "allOfProps": [],
      "oneOfProps": [],
      "name": "User",
      "classname": "User",
      "classVarName": "user",
      "modelJson": "{\n  \"type\" : \"object\",\n  \"properties\" : {\n    \"type\" : {\n      \"description\" : \"type of user\",\n      \"allOf\" : [ {\n        \"$ref\" : \"#/components/schemas/UserType\"\n      } ]\n    }\n  }\n}",
      "dataType": "JsonObject",
      "classFilename": "user",
      "isAlias": false,
      "isString": false,
      "isInteger": false,
      "isLong": false,
      "isNumber": false,
      "isNumeric": false,
      "isFloat": false,
      "isDouble": false,
      "isDate": false,
      "isDateTime": false,
      "isShort": false,
      "isUnboundedInteger": false,
      "isBoolean": false,
      "additionalPropertiesIsAnyType": false,
      "vars": [
        {
          "openApiType": "UserType",
          "baseName": "type",
          "complexType": "UserType",
          "getter": "getType",
          "setter": "setType",
          "description": "type of user",
          "dataType": "UserType",
          "datatypeWithEnum": "UserType",
          "name": "type",
          "defaultValueWithParam": " = data.type;",
          "baseType": "UserType",
          "unescapedDescription": "type of user",
          "example": "null",
          "jsonSchema": "{\n  \"description\" : \"type of user\",\n  \"allOf\" : [ {\n    \"$ref\" : \"#/components/schemas/UserType\"\n  } ]\n}",
          "exclusiveMinimum": false,
          "exclusiveMaximum": false,
          "required": false,
          "deprecated": false,
          "hasMoreNonReadOnly": false,
          "isPrimitiveType": false,
          "isModel": true,
          "isContainer": false,
          "isString": false,
          "isNumeric": false,
          "isInteger": false,
          "isShort": false,
          "isLong": false,
          "isUnboundedInteger": false,
          "isNumber": false,
          "isFloat": false,
          "isDouble": false,
          "isDecimal": false,
          "isByteArray": false,
          "isBinary": false,
          "isFile": false,
          "isBoolean": false,
          "isDate": false,
          "isDateTime": false,
          "isUuid": false,
          "isUri": false,
          "isEmail": false,
          "isNull": false,
          "isFreeFormObject": false,
          "isAnyType": true,
          "isArray": false,
          "isMap": false,
          "isEnum": false,
          "isReadOnly": false,
          "isWriteOnly": false,
          "isNullable": true,
          "isSelfReference": false,
          "isCircularReference": false,
          "isDiscriminator": false,
          "vars": [],
          "requiredVars": [],
          "vendorExtensions": {
            "x-index": 1
          },
          "hasValidation": false,
          "isInherited": false,
          "nameInCamelCase": "Type",
          "nameInSnakeCase": "TYPE",
          "uniqueItems": false,
          "isXmlAttribute": false,
          "isXmlWrapped": false,
          "additionalPropertiesIsAnyType": false,
          "hasVars": false,
          "hasRequired": false,
          "hasDiscriminatorWithNonEmptyMapping": false,
          "datatype": "UserType",
          "iexclusiveMaximum": false
        }
      ],
      "allVars": [
        {
          "openApiType": "UserType",
          "baseName": "type",
          "complexType": "UserType",
          "getter": "getType",
          "setter": "setType",
          "description": "type of user",
          "dataType": "UserType",
          "datatypeWithEnum": "UserType",
          "name": "type",
          "defaultValueWithParam": " = data.type;",
          "baseType": "UserType",
          "unescapedDescription": "type of user",
          "example": "null",
          "jsonSchema": "{\n  \"description\" : \"type of user\",\n  \"allOf\" : [ {\n    \"$ref\" : \"#/components/schemas/UserType\"\n  } ]\n}",
          "exclusiveMinimum": false,
          "exclusiveMaximum": false,
          "required": false,
          "deprecated": false,
          "hasMoreNonReadOnly": false,
          "isPrimitiveType": false,
          "isModel": true,
          "isContainer": false,
          "isString": false,
          "isNumeric": false,
          "isInteger": false,
          "isShort": false,
          "isLong": false,
          "isUnboundedInteger": false,
          "isNumber": false,
          "isFloat": false,
          "isDouble": false,
          "isDecimal": false,
          "isByteArray": false,
          "isBinary": false,
          "isFile": false,
          "isBoolean": false,
          "isDate": false,
          "isDateTime": false,
          "isUuid": false,
          "isUri": false,
          "isEmail": false,
          "isNull": false,
          "isFreeFormObject": false,
          "isAnyType": true,
          "isArray": false,
          "isMap": false,
          "isEnum": false,
          "isReadOnly": false,
          "isWriteOnly": false,
          "isNullable": true,
          "isSelfReference": false,
          "isCircularReference": false,
          "isDiscriminator": false,
          "vars": [],
          "requiredVars": [],
          "vendorExtensions": {
            "x-index": 1
          },
          "hasValidation": false,
          "isInherited": false,
          "nameInCamelCase": "Type",
          "nameInSnakeCase": "TYPE",
          "uniqueItems": false,
          "isXmlAttribute": false,
          "isXmlWrapped": false,
          "additionalPropertiesIsAnyType": false,
          "hasVars": false,
          "hasRequired": false,
          "hasDiscriminatorWithNonEmptyMapping": false,
          "datatype": "UserType",
          "iexclusiveMaximum": false
        }
      ],
      "requiredVars": [],
      "optionalVars": [
        {
          "openApiType": "UserType",
          "baseName": "type",
          "complexType": "UserType",
          "getter": "getType",
          "setter": "setType",
          "description": "type of user",
          "dataType": "UserType",
          "datatypeWithEnum": "UserType",
          "name": "type",
          "defaultValueWithParam": " = data.type;",
          "baseType": "UserType",
          "unescapedDescription": "type of user",
          "example": "null",
          "jsonSchema": "{\n  \"description\" : \"type of user\",\n  \"allOf\" : [ {\n    \"$ref\" : \"#/components/schemas/UserType\"\n  } ]\n}",
          "exclusiveMinimum": false,
          "exclusiveMaximum": false,
          "required": false,
          "deprecated": false,
          "hasMoreNonReadOnly": false,
          "isPrimitiveType": false,
          "isModel": true,
          "isContainer": false,
          "isString": false,
          "isNumeric": false,
          "isInteger": false,
          "isShort": false,
          "isLong": false,
          "isUnboundedInteger": false,
          "isNumber": false,
          "isFloat": false,
          "isDouble": false,
          "isDecimal": false,
          "isByteArray": false,
          "isBinary": false,
          "isFile": false,
          "isBoolean": false,
          "isDate": false,
          "isDateTime": false,
          "isUuid": false,
          "isUri": false,
          "isEmail": false,
          "isNull": false,
          "isFreeFormObject": false,
          "isAnyType": true,
          "isArray": false,
          "isMap": false,
          "isEnum": false,
          "isReadOnly": false,
          "isWriteOnly": false,
          "isNullable": true,
          "isSelfReference": false,
          "isCircularReference": false,
          "isDiscriminator": false,
          "vars": [],
          "requiredVars": [],
          "vendorExtensions": {},
          "hasValidation": false,
          "isInherited": false,
          "nameInCamelCase": "Type",
          "nameInSnakeCase": "TYPE",
          "uniqueItems": false,
          "isXmlAttribute": false,
          "isXmlWrapped": false,
          "additionalPropertiesIsAnyType": false,
          "hasVars": false,
          "hasRequired": false,
          "hasDiscriminatorWithNonEmptyMapping": false,
          "datatype": "UserType",
          "iexclusiveMaximum": false
        }
      ],
      "readOnlyVars": [],
      "readWriteVars": [
        {
          "openApiType": "UserType",
          "baseName": "type",
          "complexType": "UserType",
          "getter": "getType",
          "setter": "setType",
          "description": "type of user",
          "dataType": "UserType",
          "datatypeWithEnum": "UserType",
          "name": "type",
          "defaultValueWithParam": " = data.type;",
          "baseType": "UserType",
          "unescapedDescription": "type of user",
          "example": "null",
          "jsonSchema": "{\n  \"description\" : \"type of user\",\n  \"allOf\" : [ {\n    \"$ref\" : \"#/components/schemas/UserType\"\n  } ]\n}",
          "exclusiveMinimum": false,
          "exclusiveMaximum": false,
          "required": false,
          "deprecated": false,
          "hasMoreNonReadOnly": false,
          "isPrimitiveType": false,
          "isModel": true,
          "isContainer": false,
          "isString": false,
          "isNumeric": false,
          "isInteger": false,
          "isShort": false,
          "isLong": false,
          "isUnboundedInteger": false,
          "isNumber": false,
          "isFloat": false,
          "isDouble": false,
          "isDecimal": false,
          "isByteArray": false,
          "isBinary": false,
          "isFile": false,
          "isBoolean": false,
          "isDate": false,
          "isDateTime": false,
          "isUuid": false,
          "isUri": false,
          "isEmail": false,
          "isNull": false,
          "isFreeFormObject": false,
          "isAnyType": true,
          "isArray": false,
          "isMap": false,
          "isEnum": false,
          "isReadOnly": false,
          "isWriteOnly": false,
          "isNullable": true,
          "isSelfReference": false,
          "isCircularReference": false,
          "isDiscriminator": false,
          "vars": [],
          "requiredVars": [],
          "vendorExtensions": {},
          "hasValidation": false,
          "isInherited": false,
          "nameInCamelCase": "Type",
          "nameInSnakeCase": "TYPE",
          "uniqueItems": false,
          "isXmlAttribute": false,
          "isXmlWrapped": false,
          "additionalPropertiesIsAnyType": false,
          "hasVars": false,
          "hasRequired": false,
          "hasDiscriminatorWithNonEmptyMapping": false,
          "datatype": "UserType",
          "iexclusiveMaximum": false
        }
      ],
      "parentVars": [],
      "mandatory": [],
      "allMandatory": [],
      "imports": [
        "package:digitalworkkit_visitor_api/src/model/user_type.dart"
      ],
      "hasVars": true,
      "emptyVars": false,
      "hasMoreModels": false,
      "hasEnums": false,
      "isEnum": false,
      "hasValidation": false,
      "isNullable": false,
      "hasRequired": false,
      "hasOptional": true,
      "isArray": false,
      "hasChildren": false,
      "isMap": true,
      "isNull": false,
      "isDeprecated": false,
      "hasOnlyReadOnly": false,
      "vendorExtensions": {
        "x-has-vars": true
      },
      "isAdditionalPropertiesTrue": false,
      "uniqueItems": false,
      "exclusiveMinimum": false,
      "exclusiveMaximum": false,
      "isModel": false,
      "hasDiscriminatorWithNonEmptyMapping": false,
      "isAnyType": false,
      "isClassnameSanitized": false
    }
  },
  {
    "importPath": "lib.src.model.UserType",
    "model": {
      "anyOf": [],
      "oneOf": [],
      "allOf": [],
      "anyOfProps": [],
      "allOfProps": [],
      "oneOfProps": [],
      "name": "UserType",
      "classname": "UserType",
      "title": "UserType",
      "classVarName": "userType",
      "modelJson": "{\n  \"title\" : \"UserType\",\n  \"type\" : \"string\",\n  \"enum\" : [ \"admin\", \"user\" ]\n}",
      "dataType": "String",
      "classFilename": "user_type",
      "isAlias": false,
      "isString": true,
      "isInteger": false,
      "isLong": false,
      "isNumber": false,
      "isNumeric": false,
      "isFloat": false,
      "isDouble": false,
      "isDate": false,
      "isDateTime": false,
      "isShort": false,
      "isUnboundedInteger": false,
      "isBoolean": false,
      "additionalPropertiesIsAnyType": false,
      "vars": [],
      "allVars": [],
      "requiredVars": [],
      "optionalVars": [],
      "readOnlyVars": [],
      "readWriteVars": [],
      "parentVars": [],
      "allowableValues": {
        "values": [
          "admin",
          "user"
        ],
        "enumVars": [
          {
            "name": "admin",
            "isString": true,
            "value": "'admin'"
          },
          {
            "name": "user",
            "isString": true,
            "value": "'user'"
          }
        ]
      },
      "mandatory": [],
      "allMandatory": [],
      "imports": [],
      "hasVars": false,
      "emptyVars": false,
      "hasMoreModels": false,
      "hasEnums": false,
      "isEnum": true,
      "hasValidation": false,
      "isNullable": false,
      "hasRequired": false,
      "hasOptional": false,
      "isArray": false,
      "hasChildren": false,
      "isMap": false,
      "isNull": false,
      "isDeprecated": false,
      "hasOnlyReadOnly": true,
      "vendorExtensions": {
        "x-has-vars": false
      },
      "isAdditionalPropertiesTrue": false,
      "uniqueItems": false,
      "exclusiveMinimum": false,
      "exclusiveMaximum": false,
      "isModel": false,
      "hasDiscriminatorWithNonEmptyMapping": false,
      "isAnyType": false,
      "isClassnameSanitized": false
    }
  }
]
```
</details>

This causes issues when generating a client with `dart-dio-next`, as it will generate deserialization logic that doesn't compile:

```
      switch (key) {
        case r'type':
          final valueDes = serializers.deserialize(value,
              specifiedType: const FullType.nullable(UserType)) as UserType?;
          if (valueDes == null) continue;
          result.type.replace(valueDes);
          break;
      }
```

The line that doesn't compile is **`result.type.replace(valueDes);`**, as the UserType EnumClass doesn't have a **replace** method.

The replace method is generated there because the generator thinks the UserType field is a model, but it's actually an enum.

##### openapi-generator version

5.3.0

##### OpenAPI declaration file content or url

sample json spec: https://gist.github.com/josh-burton/8062bc64212db27e2a2f879ae65c07dd

##### Generation Details

dart-dio-next with built value

##### Steps to reproduce

Generate the client, run `pub run build_runner build`.

##### Related issues/PRs

[](https://github.com/OpenAPITools/openapi-generator/issues/10672)

https://github.com/OpenAPITools/openapi-generator/pull/6914

##### Suggest a fix

I think the true fix for this would be parsing the allOf block correctly. A work around in dart-dio-next would be ok too but I'm not sure how we can work around it when we don't know the actual type of the model.

@kuhnroyal @wing328

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Uh oh!

[BUG] [dart-dio-next] Models inside anyOf missing type information #10930

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Uh oh!

[BUG] [dart-dio-next] Models inside anyOf missing type information #10930

Description

Bug Report Checklist

Description

openapi-generator version

OpenAPI declaration file content or url

Generation Details

Steps to reproduce

Related issues/PRs

Suggest a fix

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

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Development

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