Describe the bug
When I try to generate models from an OpenAPI schema containing discriminators, I get an error: RuntimeError: Discriminator type is not found.
To Reproduce
Get the OpenAPI spec for the Jira REST API, or the reduced example below. Try to convert it into Pydantic models using datamodel-code-generator.
Example schema:
{
"components": {
"schemas": {
"CustomContextVariable": {
"additionalProperties": false,
"discriminator": {
"mapping": {
"issue": "#/components/schemas/IssueContextVariable",
"json": "#/components/schemas/JsonContextVariable",
"user": "#/components/schemas/UserContextVariable"
},
"propertyName": "type"
},
"oneOf": [
{
"$ref": "#/components/schemas/UserContextVariable"
},
{
"$ref": "#/components/schemas/IssueContextVariable"
},
{
"$ref": "#/components/schemas/JsonContextVariable"
}
],
"properties": {
"type": {
"description": "Type of custom context variable.",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
},
"JsonContextVariable": {
"description": "A JSON object with custom content.",
"properties": {
"type": {
"description": "Type of custom context variable.",
"type": "string"
},
"value": {
"description": "A JSON object containing custom content.",
"type": "object"
}
},
"required": [
"type"
],
"type": "object"
},
"IssueContextVariable": {
"description": "An [issue](https://developer.atlassian.com/cloud/jira/platform/jira-expressions-type-reference#issue) specified by ID or key. All the fields of the issue object are available in the Jira expression.",
"properties": {
"id": {
"description": "The issue ID.",
"format": "int64",
"type": "integer"
},
"key": {
"description": "The issue key.",
"type": "string"
},
"type": {
"description": "Type of custom context variable.",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
},
"UserContextVariable": {
"description": "A [user](https://developer.atlassian.com/cloud/jira/platform/jira-expressions-type-reference#user) specified as an Atlassian account ID.",
"properties": {
"accountId": {
"description": "The account ID of the user.",
"type": "string"
},
"type": {
"description": "Type of custom context variable.",
"type": "string"
}
},
"required": [
"accountId",
"type"
],
"type": "object"
}
}
},
"info": {
"contact": {
"email": "[email protected]"
},
"description": "Jira Cloud platform REST API documentation",
"license": {
"name": "Apache 2.0",
"url": "http://www.apache.org/licenses/LICENSE-2.0.html"
},
"termsOfService": "http://atlassian.com/terms/",
"title": "The Jira Cloud platform REST API",
"version": "1001.0.0-SNAPSHOT-157e8201994ee15df4ad7fc2b41795e7c88fbc36"
},
"openapi": "3.0.1",
"paths": {},
"servers": [
{
"url": "https://your-domain.atlassian.net"
}
],
"tags": []
}Used commandline:
$ datamodel-codegen --input test-openapi.json --input-file-type openapi --output models.py --output-model-type pydantic_v2.BaseModel
Result:
Traceback (most recent call last):
...
File ".../python3.11/site-packages/datamodel_code_generator/parser/base.py", line 772, in __apply_discriminator_type
raise RuntimeError(
RuntimeError: Discriminator type is not found. test-openapi.json#/components/schemas/CustomContextVariable#-datamodel-code-generator-#-oneOf-#-special-##-datamodel-code-generator-#-oneOfCommon-#-special-#/0
Expected behavior
The command should generate a file models.py containing pydantic models.
Version:
- OS: Ubuntu
- Python version: 3.11.4
- datamodel-code-generator version: 0.25.3
Additional context
None
koxudaxi / datamodel-code-generator
Pydantic model and dataclasses.dataclass generator for easy conversion of JSON, OpenAPI, JSON Schema, and YAML data sources.
2.7k
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