Generate models from official docker specification

[insidieux]

Problem statement

Generation models for official docker swagger specification is writing models with error in validation methods.

Swagger specification

https://raw.githubusercontent.com/docker/engine/v19.03.13/api/swagger.yaml

Steps to reproduce

swagger generate model \
    -f https://raw.githubusercontent.com/docker/engine/v19.03.13/api/swagger.yaml \
    --target internal/generated

Example

Definition https://raw.githubusercontent.com/docker/engine/v19.03.13/api/swagger.yaml#/definitions/PortMap

Part of generated code for definition

// swagger:model PortMap
type PortMap map[string]*[]PortBinding

// Validate validates this port map
func (m PortMap) Validate(formats strfmt.Registry) error {
	var res []error
	for k := range m {
		if err := validate.Required(k, "body", m[k]); err != nil {
			return err
		}
		for i := 0; i < len(m[k]); i++ {
			if err := m[k][i].Validate(formats); err != nil {
				if ve, ok := err.(*errors.Validation); ok {
					return ve.ValidateName(k + "." + strconv.Itoa(i))
				}
				return err
			}
		}
	}
	if len(res) > 0 {
		return errors.CompositeValidationError(res...)
	}
	return nil
}

We can't get len(m[k]) cause of pointer to slice.
And we can't get m[k][i] cause pointer does not support indexing.
So build will be failed.

Environment

swagger version: v0.26.0
go version: 1.15.6
OS: darwin/linux

[insidieux]

@fredbi can you make a release/tag 0.26.1? we need docker image with new version and with this fix.