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dal_model.go
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/
dal_model.go
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package ddl
import (
"context"
"fmt"
"github.com/cortezaproject/corteza/server/pkg/dal"
)
// CreateModel creates table with columns and indexes that match Model definition
func CreateModel(ctx context.Context, dd DataDefiner, m *dal.Model) (err error) {
var (
t *Table
)
if t, err = dd.ConvertModel(m); err != nil {
return err
}
if err = dd.TableCreate(ctx, t); err != nil {
return err
}
if err = EnsureIndexes(ctx, dd, m.Indexes...); err != nil {
return
}
return
}
func DeleteModel(ctx context.Context, dd DataDefiner, m *dal.Model) (err error) {
return fmt.Errorf("not implemented")
}
// UpdateModel alters existing table's columns and indexes to match Model definition
func UpdateModel(ctx context.Context, dd DataDefiner, m *dal.Model) (err error) {
var (
t *Table
col *Column
colIdent string
)
if t, err = dd.TableLookup(ctx, m.Ident); err != nil {
return err
}
// @todo check model against table structure
for _, attr := range m.Attributes {
// iterate over attributes and check if they exist in the table
colIdent = attr.StoreIdent()
col = t.ColumnByIdent(colIdent)
if col != nil {
// @todo check if column type matches
// @todo check if column is nullable
continue
}
// @todo add column to table
return fmt.Errorf("column %q on table %q not found; adding columns is not yet supported", attr.Ident, m.Ident)
}
if err = EnsureIndexes(ctx, dd, m.Indexes...); err != nil {
return
}
return
}
func EnsureIndexes(ctx context.Context, dd DataDefiner, ii ...*dal.Index) (err error) {
return nil
}