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Tableview reload
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This is the full code
import ui import sqlite3 as db conn = db.connect('pythonsqlite.db') conn.row_factory = lambda cursor, row: row[0] c = conn.cursor() ids = c.execute('SELECT name FROM Names').fetchall() ids1 = c.execute('SELECT surname FROM Names').fetchall() class MyTableViewDataSource (object): def tableview_number_of_sections(self, tableview): # Return the number of sections (defaults to 1) return 1 def tableview_number_of_rows(self, tableview, section): # Return the number of rows in the section return len(ids) def tableview_cell_for_row(self, tableview, section, row): # Create and return a cell for the given section/row self.data = ids self.data1 = ids1 self.cells = [ui.TableViewCell('value1') #'subtitle' for _ in range(len(self.data))] cell = self.cells[row] cell.text_label.text = self.data[row] cell.detail_text_label.text = self.data1[row] return cell def tableview_title_for_header(self, tableview, section): # Return a title for the given section. # If this is not implemented, no section headers will be shown. return ('Name') def tableview_can_delete(self, tableview, section, row): # Return True if the user should be able to delete the given row. return True def tableview_can_move(self, tableview, section, row): # Return True if a reordering control should be shown for the given row (in editing mode). return True def tableview_delete(self, tableview, section, row): # Called when the user confirms deletion of the given row. print ('Delete row ' + tableview.data_source.data[row]) sqliteConnection = db.connect('pythonsqlite.db') cursor = sqliteConnection.cursor() print("Connected to SQLite") # Deleting single record now sql_delete_query = "DELETE from Names where Name=""'"+tableview.data_source.data[row]+"'" print(sql_delete_query) cursor.execute(sql_delete_query) sqliteConnection.commit() print("Record deleted successfully ") del tableview.data_source.data[row] del tableview.data_source.data1[row] cursor.close() tableview.reload() pass def tableview_move_row(self, tableview, from_section, from_row, to_section, to_row): # Called when the user moves a row with the reordering control (in editing mode). pass def addBtn(sender): sqliteConnection = db.connect('pythonsqlite.db') cursor = sqliteConnection.cursor() print("Connected to SQLite") # adding single record now sql_add_data = "INSERT INTO Names (Name, Surname) VALUES ('?','?')" print(sql_add_data) cursor.execute(sql_add_data) sqliteConnection.commit() print("Record successfully Added ") v = ui.load_view('MyForm') v['tableview1'].data_source = MyTableViewDataSource() v.present('sheet')
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Ok, where to begin?
Your data source is providing cells based on
ids
, which you never update. So, of course your data source will never know about the update. When you add the rows, you should also updateids
andids1
. Even better than using a global variable, you should create an instance of your data source, and then add ids as an attribute to your instance.Other issues:
self.cells = [ui.TableViewCell('value1') #'subtitle' for _ in range(len(self.data))]
This is not doing what you think... cell for row gets called EVERY time a cell comes into view. You are creating and throwing away a zillion TableViewCells. If you want to reuse cells, fine, but create them in
__init__
. But then don’t forget to append to it in your button callback.You should never call reload, until your data source is prepared to provide the new rows (or in case of delete, your data source must know the rows are deleted). If you keep your data up to date, then you never actually need to call reload, unless you have somehow changed your entire table.
Tableviews can be a bit tricky — the whole idea is that the table view and tableviewcells are not the data, they are just a lightweight view showing a window to the data. Don’t worry about trying to cache the table view cells — just create a new cell, fill in the info about the row, and return it. The OS magic then handles displaying the cell. The OS will query your data source before the first view to figure out how many cells there will be, and then figures out how many cells will fit on the screen, and only asks for that many cells. As you scroll, it is asking for cells. If you call add or delete, it will ask for data about the inserted cells.
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Thank you so much, I’l try to figure it out. Just can’t find any live example in the web. But how it works for deleting? And same thing (System) doesn’t work for adding the rows.
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I did it, thank you so much!
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You should post your solution (or a link to gist) back here to help others that might have similar issues.
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Here is how it works for me.
import ui import sqlite3 as db import dialogs conn = db.connect('pythonsqlite.db') conn.row_factory = lambda cursor, row: row[0] c = conn.cursor() ids = c.execute('SELECT name FROM Names').fetchall() ids1 = c.execute('SELECT surname FROM Names').fetchall() class MyTableViewDataSource (object): def __init__(self): self.items = ids self.items1 = ids1 def tableview_number_of_sections(self, tableview): # Return the number of sections (defaults to 1) return 1 def tableview_number_of_rows(self, tableview, section): # Return the number of rows in the section return len(self.items) def tableview_cell_for_row(self, tableview, section, row): # Create and return a cell for the given section/row cell = ui.TableViewCell('subtitle') cell.text_label.text = self.items[row] cell.detail_text_label.text = self.items1[row] return cell def tableview_title_for_header(self, tableview, section): # Return a title for the given section. # If this is not implemented, no section headers will be shown. return ('Name') def tableview_can_delete(self, tableview, section, row): # Return True if the user should be able to delete the given row. return True def tableview_can_move(self, tableview, section, row): # Return True if a reordering control should be shown for the given row (in editing mode). return True def tableview_delete(self, tableview, section, row): # Called when the user confirms deletion of the given row. #my = ("Name=""'"+tableview.data_source.data[row]+"'") #print(my) print ('Delete row ' + tableview.data_source.items[row]) sqliteConnection = db.connect('pythonsqlite.db') cursor = sqliteConnection.cursor() print("Connected to SQLite") # Deleting single record now sql_delete_query = "DELETE from Names where Name=""'"+tableview.data_source.items[row]+"'" print(sql_delete_query) cursor.execute(sql_delete_query) sqliteConnection.commit() print("Record deleted successfully ") del tableview.data_source.items[row] del tableview.data_source.items1[row] cursor.close() tableview.reload() pass def tableview_move_row(self, tableview, from_section, from_row, to_section, to_row): # Called when the user moves a row with the reordering control (in editing mode). pass def add(self, sender): item = dialogs.input_alert('Add your name') item1 = dialogs.input_alert('Add your surname') if not item == None: self.items.append(item) self.items1.append(item1) view['tableview1'].reload() sqliteConnection = db.connect('pythonsqlite.db') cursor = sqliteConnection.cursor() print("Connected to SQLite") # adding single record now sql_add_data = "INSERT INTO Names (Name, Surname) VALUES "+"("+"'"+item+"'"+", "+"'"+item1+"'"+")" cursor.execute(sql_add_data) sqliteConnection.commit() cursor.close() view = ui.load_view('MyForm') source = MyTableViewDataSource() view.right_button_items = [ui.ButtonItem(title='add', action=source.add)] view['tableview1'].data_source = source view.present('sheet')
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But. Can you bring a dB from another place and drop it in Pythonista and how u do it
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@cvp said:
import
For me the file is not accessible greyes out
https://imgur.com/KTy2w8o all my dB files are not selectables -
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@soydepr other solution: you can share a .db file from the Files app to Pythonista and run the standard "import file" script
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@cvp is original solution a bug ,
Thanks I confirm your other solution does work
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This post is deleted!