[Go] UNKNOWN_BASE_TYPE and incorrect v2 selection

[adamdecaf]

Description

I'm trying to generate a Go client with the following spec: https://github.com/adamdecaf/openapitools-unknown_base_type-bug

However, the generation fails:

[main] WARN  o.o.codegen.DefaultCodegen - The following schema has undefined (null) baseType. It could be due to form parameter defined in OpenAPI v2 spec with incorrect consumes. A correct 'consumes' for form parameters should be 'application/x-www-form-urlencoded' or 'multipart/form-data'
...
[main] WARN  o.o.codegen.DefaultCodegen - codegenModel is null. Default to UNKNOWN_BASE_TYPE

I don't know why v2 is mentioned. This is a v3.0.1 OpenAPI file, not v2.

openapi-generator version

v3.3.0 v3.3.1-SNAPSHOT and v3.4.0-SNAPSHOT (as of 2018-10-12)

Command line used for generation

Run make in the project linked above or use the following:

$ ./openapi-generator generate -i openapi.yaml -g go -o ./client

Full output

$ make
rm -rf client/
export OPENAPI_GENERATOR_VERSION=v3.3.0 # v3.3.0, v3.3.1-SNAPSHOT, v3.4.0-SNAPSHOT
chmod +x ./openapi-generator
ionice -c2 ./openapi-generator generate -i openapi.yaml -g go -o ./client
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.9:get (default-cli) @ standalone-pom ---
[INFO] Resolving org.openapitools:openapi-generator-cli:jar:3.3.0
[WARNING] destination/dest parameter is deprecated: it will disappear in future version.
[INFO] Copying /home/adam/.m2/repository/org/openapitools/openapi-generator-cli/3.3.0/openapi-generator-cli-3.3.0.jar to /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/openapi-generator-cli-3.3.0.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.931 s
[INFO] Finished at: 2018-10-12T18:55:13+00:00
[INFO] Final Memory: 11M/38M
[INFO] ------------------------------------------------------------------------
[main] WARN  o.o.c.ignore.CodegenIgnoreProcessor - Output directory does not exist, or is inaccessible. No file (.openapi-generator-ignore) will be evaluated.
[main] INFO  o.o.c.languages.AbstractGoCodegen - Environment variable GO_POST_PROCESS_FILE not defined so Go code may not be properly formatted. To define it, try `export GO_POST_PROCESS_FILE="/usr/local/bin/gofmt -w"` (Linux/Mac)
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/model_customer.go
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/docs/Customer.md
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/model_customers.go
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/docs/Customers.md
[main] WARN  o.o.codegen.DefaultCodegen - The following schema has undefined (null) baseType. It could be due to form parameter defined in OpenAPI v2 spec with incorrect consumes. A correct 'consumes' for form parameters should be 'application/x-www-form-urlencoded' or 'multipart/form-data'
[main] WARN  o.o.codegen.DefaultCodegen - schema: class Schema {
    title: null
    multipleOf: null
    maximum: null
    exclusiveMaximum: null
    minimum: null
    exclusiveMinimum: null
    maxLength: null
    minLength: null
    pattern: null
    maxItems: null
    minItems: null
    uniqueItems: null
    maxProperties: null
    minProperties: null
    required: [defaultDepository, email]
    type: null
    not: null
    properties: {email=class StringSchema {
        class Schema {
            title: null
            multipleOf: null
            maximum: null
            exclusiveMaximum: null
            minimum: null
            exclusiveMinimum: null
            maxLength: null
            minLength: null
            pattern: null
            maxItems: null
            minItems: null
            uniqueItems: null
            maxProperties: null
            minProperties: null
            required: null
            type: null
            not: null
            properties: null
            additionalProperties: null
            description: The customers email address
            format: e-mail
            $ref: null
            nullable: null
            readOnly: null
            writeOnly: null
            example: null
            externalDocs: null
            deprecated: null
            discriminator: null
            xml: null
        }
        type: string
        _default: null
        _enum: null
    }, defaultDepository=class StringSchema {
        class Schema {
            title: null
            multipleOf: null
            maximum: null
            exclusiveMaximum: null
            minimum: null
            exclusiveMinimum: null
            maxLength: null
            minLength: null
            pattern: null
            maxItems: null
            minItems: null
            uniqueItems: null
            maxProperties: null
            minProperties: null
            required: null
            type: null
            not: null
            properties: null
            additionalProperties: null
            description: The depository account to be used by default per transfer. ID must be a valid Customer Depository account
            format: null
            $ref: null
            nullable: null
            readOnly: null
            writeOnly: null
            example: 0c5e215c
            externalDocs: null
            deprecated: null
            discriminator: null
            xml: null
        }
        type: string
        _default: null
        _enum: null
    }, metadata=class StringSchema {
        class Schema {
            title: null
            multipleOf: null
            maximum: null
            exclusiveMaximum: null
            minimum: null
            exclusiveMinimum: null
            maxLength: null
            minLength: null
            pattern: null
            maxItems: null
            minItems: null
            uniqueItems: null
            maxProperties: null
            minProperties: null
            required: null
            type: null
            not: null
            properties: null
            additionalProperties: null
            description: Additional meta data to be used for display only
            format: null
            $ref: null
            nullable: null
            readOnly: null
            writeOnly: null
            example: Authorized for re-occurring WEB
            externalDocs: null
            deprecated: null
            discriminator: null
            xml: null
        }
        type: string
        _default: null
        _enum: null
    }}
    additionalProperties: null
    description: null
    format: null
    $ref: null
    nullable: null
    readOnly: null
    writeOnly: null
    example: null
    externalDocs: null
    deprecated: null
    discriminator: null
    xml: null
}
[main] WARN  o.o.codegen.DefaultCodegen - codegenModel is null. Default to UNKNOWN_BASE_TYPE
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/api_customers.go
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/docs/CustomersApi.md
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/api/openapi.yaml
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/README.md
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/git_push.sh
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/.gitignore
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/configuration.go
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/client.go
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/response.go
[main] INFO  o.o.codegen.DefaultGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/.travis.yml
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/.openapi-generator-ignore
[main] INFO  o.o.codegen.AbstractGenerator - writing file /home/adam/code/src/github.com/adamdecaf/openapitools-unknown_base_type-bug/./client/.openapi-generator/VERSION

[adamdecaf]

Closing. I think #1112 is the issue. I had some errors in my OpenAPI spec.

[lornajane]

I didn't have errors that any validator could see but I was missing type: object which should have been alongside properties. Just adding this here in case anyone else (or future me!) could benefit from this anecdata.