I have 2 tables: chat and chat_messages. I want to get only those chats which don't have chat_messages from users (they may have messages from other sources like admins). This code returns 0 records, I can't figure out why: message_count_subquery…
(Note - I'm aware of this apparently-duplicate question, but the answer provided there does not work) I'm trying to convert a SqlAlchemy Join Query to JSON, such that the columns from both joined tables are reflected in the output. All…
My problem next: I can't execute query, where need to get list of Accounts with their Records by account_id as sum of Records. My query next: subq = ( select( func.sum(Record.amount).label('amount') ) .filter(Record.account_id == Account.uuid) .subquery() ) accounts = (…
I have a table with column name "collation" whose schema I cannot change. I generated some data I want to insert into this table using the following code snippet: from sqlalchemy.dialects import postgresql data = [{"collation": "foo"}, {"collation":"bar"}] stmt =…
I've got a database table in a Postgres 15 database, it's got two columns (amongst others), one is of type daterange, the other is tstzrange. We've got some code that inserts to this table with raw SQL (via sqlalchemy core)…
Trying to do a self join on a model but am getting confused how to do so in sqlmodel ORM. Something equivalent to the use of following SQL in Postgresql. SELECT tt.id, ttp.parent_name, tt.name FROM target_table tt, (select DISTINCT bb.parent_id,…
Defining the class: from sqlmodel import Field, SQLModel, create_engine, Session, select, Column,String class person(SQLModel, table=True): id: Optional[int] = Field(default=None, primary_key=True) name: str = Field(max_length=100) nickname: str = Field(max_length=30) sqlmodel creates the table person: CREATE TABLE person( id SERIAL NOT NULL,…
from sqlalchemy import create_engine, text db_connection_str = "mysql+pymysql://user:pass@some_mariadb/dbname?charset=utf8mb4" #Don't worry while running the code , I had replaced all the values in the db_connection_str with my values engine = create_engine( db_connection_str, connect_args={ # "ssl": { # "ssl_ca": "/etc/ssl/cert.pem", # }…
I have a table called Gerechten with the columns: id, gerecht, beschrijving, categorie, prijs, url and sterren. In this table i have a lot of rows, so i used a jinja loop in the html script to loop through every…
I am working on custom types in sqlalchemy columns using TypeDecorator. I'm storing my data in JSONB inside Postgres DB, but in code I am serializing and deserializing it in a data class. But when I change any field of…