fix order by field for kingshard

cmd/gobay/templates/spec/enttmpl/dialect_sql_by.tmpl

@@ -0,0 +1,72 @@
+{{/*
+Copyright 2019-present Facebook Inc. All rights reserved.
+This source code is licensed under the Apache 2.0 license found
+in the LICENSE file in the root directory of this source tree.
+*/}}
+
+{{/* gotype: entgo.io/ent/entc/gen.Graph */}}
+
+{{ define "dialect/sql/order/signature" -}}
+// OrderFunc applies an ordering on the sql selector.
+type OrderFunc func(*sql.Selector)
+
+// columnChecker returns a function indicates if the column exists in the given column.
+func columnChecker(table string) func(string) error {
+	checks := map[string]func(string) bool{
+		{{- range $n := $.Nodes }}
+			{{ $n.Package }}.Table: {{ $n.Package }}.ValidColumn,
+		{{- end }}
+	}
+	check, ok := checks[table]
+	if !ok {
+		return func(string) error {
+			return fmt.Errorf("unknown table %q", table)
+		}
+	}
+	return func(column string) error {
+		if !check(column) {
+			return fmt.Errorf("unknown column %q for table %q", column, table)
+		}
+		return nil
+	}
+}
+{{- end }}
+
+{{ define "dialect/sql/order/func" -}}
+	{{- $f := $.Scope.Func -}}
+	func(s *sql.Selector) {
+		check := columnChecker(s.TableName())
+		for _, f := range fields {
+			if err := check(f); err != nil {
+				s.AddError(&ValidationError{Name: f, err: fmt.Errorf("{{ base $.Config.Package }}: %w", err)})
+			}
+			s.OrderBy(sql.{{ $f }}(f))
+		}
+	}
+{{- end }}
+
+{{/* custom signature for group-by function */}}
+{{ define "dialect/sql/group/signature" -}}
+	type AggregateFunc func(*sql.Selector) string
+{{- end }}
+
+{{ define "dialect/sql/group/as" -}}
+	func(s *sql.Selector) string {
+			return sql.As(fn(s), end)
+	}
+{{- end }}
+
+{{ define "dialect/sql/group/func" -}}
+	{{- $fn := $.Scope.Func -}}
+	{{- $withField := $.Scope.WithField -}}
+	func(s *sql.Selector) string {
+		{{- if $withField }}
+			check := columnChecker(s.TableName())
+			if err := check(field); err != nil {
+				s.AddError(&ValidationError{Name: field, err: fmt.Errorf("{{ base $.Config.Package }}: %w", err)})
+				return ""
+			}
+		{{- end }}
+		return sql.{{ if eq $fn "Mean" }}Avg{{ else }}{{ $fn }}{{ end }}({{ if $withField }}s.C(field){{ else }}"*"{{ end }})
+	}
+{{- end }}