Postgres版本：9.5.0
我有一个数据库表，其中的一列存储为表示json值的文本。 json值是字典e.x的数组：
table_id我试图更新与键update table1 set "json_column" = jsonb_set("json_column", "{0, table_id}", null, false) where id = 1;
相关的值仅用于第一个数组元素。这是我运行的查询：
ERROR: column "{0, table_id}" does not exist我一直遇到错误-import kivy
kivy.require("1.10.1")
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import NumericProperty, ReferenceListProperty, ObjectProperty
from kivy.vector import Vector
from kivy.clock import Clock
from random import randint
class PongBall(Widget):
velocity_x = NumericProperty(0)
velocity_y = NumericProperty(0)
velocity = ReferenceListProperty(velocity_x, velocity_y)
def update_speed(self):
self.velocity[1] = self.velocity[1] - 15/60
self.pos = Vector(*self.velocity) + self.pos
class PongGame(Widget):
ball = ObjectProperty(None)
def serve_ball(self):
self.ball.center = self.center
self.ball.velocity = Vector(0, 0)
def update(self, dt):
self.ball.update_speed()
if (self.ball.y < 0) or (self.ball.top > self.height):
self.ball.velocity_y *= -1
if (self.ball.x < 0) or (self.ball.right > self.width):
self.serve_ball()
class PongApp(App):
def build(self):
game = PongGame()
game.serve_ball()
Clock.schedule_interval(game.update, 1.0/60.0)
return game
if __name__ == '__main__':
PongApp().run()
有人可以帮助我了解如何解决此问题吗？