Добавил информацию о типе объекта. Просто фиксы

dbapp/mainapp/utils.py

@@ -1205,3 +1205,106 @@ def get_first_param_subquery(field_name: str):
         ...     print(obj.first_freq)
     """
     return F(f"parameter_obj__{field_name}")
+
+
+# ============================================================================
+# Number Formatting Functions
+# ============================================================================
+
+def format_coordinate(value):
+    """
+    Format coordinate value to 4 decimal places.
+    
+    Args:
+        value: Numeric coordinate value
+        
+    Returns:
+        str: Formatted coordinate or '-' if None
+    """
+    if value is None:
+        return '-'
+    try:
+        return f"{float(value):.4f}"
+    except (ValueError, TypeError):
+        return '-'
+
+
+def format_frequency(value):
+    """
+    Format frequency value to 3 decimal places.
+    
+    Args:
+        value: Numeric frequency value in MHz
+        
+    Returns:
+        str: Formatted frequency or '-' if None
+    """
+    if value is None:
+        return '-'
+    try:
+        return f"{float(value):.3f}"
+    except (ValueError, TypeError):
+        return '-'
+
+
+def format_symbol_rate(value):
+    """
+    Format symbol rate (bod_velocity) to integer.
+    
+    Args:
+        value: Numeric symbol rate value
+        
+    Returns:
+        str: Formatted symbol rate or '-' if None
+    """
+    if value is None:
+        return '-'
+    try:
+        return f"{float(value):.0f}"
+    except (ValueError, TypeError):
+        return '-'
+
+
+def format_coords_display(point):
+    """
+    Format geographic point coordinates for display.
+    
+    Args:
+        point: GeoDjango Point object
+        
+    Returns:
+        str: Formatted coordinates as "LAT LON" or '-' if None
+    """
+    if not point:
+        return '-'
+    try:
+        longitude = point.coords[0]
+        latitude = point.coords[1]
+        lon = f"{abs(longitude):.4f}E" if longitude > 0 else f"{abs(longitude):.4f}W"
+        lat = f"{abs(latitude):.4f}N" if latitude > 0 else f"{abs(latitude):.4f}S"
+        return f"{lat} {lon}"
+    except (AttributeError, IndexError, TypeError):
+        return '-'
+
+
+def parse_pagination_params(request):
+    """
+    Parse pagination parameters from request.
+    
+    Args:
+        request: Django request object
+        
+    Returns:
+        tuple: (page_number, items_per_page)
+    """
+    page_number = request.GET.get("page", 1)
+    items_per_page = request.GET.get("items_per_page", 50)
+    
+    try:
+        items_per_page = int(items_per_page)
+        if items_per_page not in [50, 100, 500, 1000]:
+            items_per_page = 50
+    except (ValueError, TypeError):
+        items_per_page = 50
+    
+    return page_number, items_per_page