hasura/graphql-engine · error

seed operations on database '%s' of kind '%s' is not support

Error message

seed operations on database '%s' of kind '%s' is not supported

What it means

Returned by `hasura seed create` when the metadata source's kind does not support seed operations. The CLI checks seed.IsSeedsSupported(ec.Source.Kind) before exporting/creating seeds; only certain source kinds (e.g. postgres) support seeds.

Source

Thrown at cli/commands/seed_create.go:80

			if ec.Config.Version < cli.V3 {
				return nil
			}

			err = databaseChooser(ec)
			if err != nil {
				return errors.E(op, err)
			}

			err = validateSourceInfo(ec)
			if err != nil {
				return errors.E(op, err)
			}
			// check if seed ops are supported for the database
			if !seed.IsSeedsSupported(ec.Source.Kind) {
				return errors.E(
					op,
					fmt.Errorf(
						"seed operations on database '%s' of kind '%s' is not supported",
						ec.Source.Name,
						ec.Source.Kind,
					),
				)
			}

			return nil
		},
		RunE: func(cmd *cobra.Command, args []string) error {
			op := genOpName(cmd, "RunE")
			opts.SeedName = args[0]
			opts.Source = ec.Source
			opts.Driver = getSeedDriver(ec, ec.Config.Version)

			err := opts.Run()
			if err != nil {
				return errors.E(op, err)

View on GitHub (pinned to 724551b9ae)

Solutions

1. Re-run targeting a postgres source, e.g. `hasura seed create --database-name <pg-source-name>` (or add --source on older CLIs)
2. Add a postgres source to metadata (databases.yaml) if the project only has unsupported kinds
3. If you must seed a non-pg database, apply data manually with that database's native tooling (sqlcmd, etc.)

Example fix

// before
hasura seed create my_seed --database-name mssql-source
// after
hasura seed create my_seed --database-name postgres-source

// before running seed create, check the source kind
import "github.com/hasura/graphql-engine/cli/mobile/plugins/hasura/internal/seed" // conceptual

func seedsSupported(kind hasura.SourceKind) bool {
    switch kind {
    case hasura.SourceKindPG, hasura.SourceKindCitus:
        return true
    }
    return false
}

if !seedsSupported(source.Kind) {
    log.Fatalf("source %s (%s) does not support seeds", source.Name, source.Kind)
}

func isSeedableSource(s *hasura.Source) bool {
    return s != nil && (s.Kind == hasura.SourceKindPG || s.Kind == hasura.SourceKindCitus)
}

When it happens

Trigger: Running `hasura seed create` against a metadata source whose kind is not supported (e.g. mssql, citus, or any non-postgres backend added in metadata databases.yaml), given IsSeedsSupported returns false for that kind.

Common situations: Projects with multiple sources where the default/selected source is MSSQL (common on Azure), or custom data-source plugins registered with an unsupported kind.

Related errors

• error while applying seeds for database '%s': %w
• exporting seed data: %w
• cannot find default editor from env: %w
• failed to create seed file: %w
• unsupported source kind, source name: %v kind: %v

AI-assisted analysis of hasura/graphql-engine@724551b9ae (2026-08-28). Data as JSON: /api/errors/5b6a36c3548a6634. Report an issue: GitHub.