I can save and load Datagrid content

src/myfasthtml/controls/DataGrid.py

@@ -12,7 +12,7 @@ from myfasthtml.core.instances import MultipleInstance
 
 class DatagridState(DbObject):
   def __init__(self, owner):
-    super().__init__(owner)
+    super().__init__(owner, name=f"{owner.get_full_id()}-state")
     with self.initializing():
       self.sidebar_visible: bool = False
       self.selected_view: str = None
@@ -25,12 +25,12 @@ class DatagridState(DbObject):
       self.filtered: dict = {}
       self.edition: DatagridEditionState = DatagridEditionState()
       self.selection: DatagridSelectionState = DatagridSelectionState()
-      self.html = None
+      self.ne_data = None
 
 
 class DatagridSettings(DbObject):
   def __init__(self, owner):
-    super().__init__(owner)
+    super().__init__(owner, name=f"{owner.get_full_id()}-settings")
     with self.initializing():
       self.file_name: Optional[str] = None
       self.selected_sheet_name: Optional[str] = None
@@ -52,12 +52,13 @@ class DataGrid(MultipleInstance):
     self._state = DatagridState(self)
     self.commands = Commands(self)
   
-  def set_html(self, html):
-    self._state.html = html
+  def init_from_dataframe(self, df):
+    self._state.ne_data = df
   
   def render(self):
+    html = self._state.ne_data.to_html(index=False) if self._state.ne_data is not None else "Content lost !"
     return Div(
-      NotStr(self._state.html) if self._state.html else "Content lost !",
+      NotStr(html),
       id=self._id
     )
   

src/myfasthtml/controls/DataGridsManager.py

@@ -23,7 +23,7 @@ class DocumentDefinition:
   document_id: str
   namespace: str
   name: str
-  type: str
+  type: str # table, card,
   tab_id: str
   datagrid_id: str
 
@@ -32,7 +32,7 @@ class DataGridsState(DbObject):
   def __init__(self, owner, name=None):
     super().__init__(owner, name=name)
     with self.initializing():
-      self.elements: list = [DocumentDefinition]
+      self.elements: list[DocumentDefinition] = []
 
 
 class Commands(BaseCommands):
@@ -91,9 +91,8 @@ class DataGridsManager(MultipleInstance):
   def open_from_excel(self, tab_id, file_upload: FileUpload):
     excel_content = file_upload.get_content()
     df = pd.read_excel(excel_content, file_upload.get_sheet_name())
-    html = df.to_html(index=False)
     dg = DataGrid(self._tabs_manager)
-    dg.set_html(html)
+    dg.init_from_dataframe(df)
     document = DocumentDefinition(
       document_id=str(uuid.uuid4()),
       namespace=file_upload.get_file_basename(),

src/myfasthtml/core/dbmanager.py

@@ -55,13 +55,14 @@ class DbObject:
       self._initializing = old_state
   
   def __setattr__(self, name: str, value: str):
-    if name.startswith("_") or name.startswith("ns") or getattr(self, "_initializing", False):
+    if name.startswith("_") or name.startswith("ns_") or getattr(self, "_initializing", False):
       super().__setattr__(name, value)
       return
     
-    old_value = getattr(self, name, None)
-    if old_value == value:
-      return
+    if not name.startswith("ne_"):
+      old_value = getattr(self, name, None)
+      if old_value == value:
+        return
     
     super().__setattr__(name, value)
     self._save_self()

src/myfasthtml/core/instances.py

@@ -144,8 +144,11 @@ class UniqueInstance(BaseInstance):
                parent: Optional[BaseInstance] = None,
                session: Optional[dict] = None,
                _id: Optional[str] = None,
-               auto_register: bool = True):
+               auto_register: bool = True,
+               on_init=None):
     super().__init__(parent, session, _id, auto_register)
+    if on_init is not None:
+      on_init()
 
 
 class MultipleInstance(BaseInstance):