BUGFIX: annoyances when editing a almanach

dbmodels/places_functions.go

@@ -12,6 +12,11 @@ const (
 	maxPlacesSearchLimit     = 50
 )
 
+type PlaceCount struct {
+	ID    string `db:"id"`
+	Count int    `db:"count"`
+}
+
 // SearchPlaces performs a lightweight search against the places table using the provided term.
 // It matches against the place name and pseudonyms fields.
 func SearchPlaces(app core.App, term string, limit int) ([]*Place, error) {
@@ -41,3 +46,47 @@ func SearchPlaces(app core.App, term string, limit int) ([]*Place, error) {
 
 	return places, nil
 }
+
+// CountPlacesBaende counts the number of Bände (entries) linked to each place.
+// Returns a map of place ID -> count.
+func CountPlacesBaende(app core.App, ids []any) (map[string]int, error) {
+	if len(ids) == 0 {
+		return map[string]int{}, nil
+	}
+
+	counts := []PlaceCount{}
+
+	// For each place ID, count how many entries have this place in their places field
+	for _, id := range ids {
+		var count int64
+
+		// Query counts entries where the places field contains this place ID
+		// PocketBase stores relation fields as JSON arrays, even for single values
+		err := app.DB().
+			Select("COUNT(*)").
+			From(ENTRIES_TABLE).
+			Where(dbx.NewExp(
+				"json_valid("+PLACES_TABLE+") = 1 AND EXISTS (SELECT 1 FROM json_each("+PLACES_TABLE+") WHERE value = {:id})",
+				dbx.Params{"id": id},
+			)).
+			Row(&count)
+
+		if err != nil {
+			return nil, err
+		}
+
+		if count > 0 {
+			counts = append(counts, PlaceCount{
+				ID:    id.(string),
+				Count: int(count),
+			})
+		}
+	}
+
+	ret := make(map[string]int, len(counts))
+	for _, c := range counts {
+		ret[c.ID] = c.Count
+	}
+
+	return ret, nil
+}