insertion of nested array of custom in table for postgres

问题

command = (

CREATE TYPE belongings AS (
   item TEXT,
   quantity INTEGER
)

CREATE TYPE student AS ( 
   name TEXT,
   id  INTEGER,
   bag belongings[]
)

CREATE TABLE studentclass( 
    date DATE NOT NULL,
    time TIMESTAMPTZ NOT NULL, 
    PRIMARY KEY (date, time), 
    class student
)
)

Can i ask how to do insert for this in postgres psycog2? thank you.

When i put the insert as insert_sql = "INSERT INTO studentclass (date, time, class) VALUES (%s,%s,%s)"

error output is DETAIL: Cannot cast type text[] to belongings[] in column

I don't think i just cast it with "::belongings[]" in the INSERT statement as it is a nested.

My earlier asked question for a simpler table.

Unable to insert nested record in postgres

来源：https://stackoverflow.com/questions/64922416/insertion-of-nested-array-of-custom-in-table-for-postgres