SQLAlchemy equivalent to SQL "LIKE" statement

A tags column has values like "apple banana orange" and "strawberry banana lemon". I want to find the SQLAlchemy equivalent statement to

SELECT * FROM table WHERE tags LIKE "%banana%"; 

What should I pass to Class.query.filter() to do this?

7 Answers

Each column has like() method, which can be used in query.filter(). Given a search string, add a % character on either side to search as a substring in both directions.

tag = request.form["tag"] search = "%{}%".format(tag) posts = Post.query.filter(Post.tags.like(search)).all() 

Adding to the above answer, whoever looks for a solution, you can also try 'match' operator instead of 'like'. Do not want to be biased but it perfectly worked for me in Postgresql.

Note.query.filter(Note.message.match("%somestr%")).all() 

It inherits database functions such as CONTAINS and MATCH. However, it is not available in SQLite.

For more info go Common Filter Operators

try this code

output = dbsession.query(<model_class>).filter(<model_calss>.email.ilike('%' + < email > + '%')) 

In case you want the case insensitive like clause implementation:

session.query(TableName).filter(TableName.colName.ilike(f'%{search_text}%')).all() 

If you use native sql, you can refer to my code, otherwise just ignore my answer.

SELECT * FROM table WHERE tags LIKE "%banana%"; 

from sqlalchemy import text bar_tags = "banana" # '%' attention to spaces query_sql = """SELECT * FROM table WHERE tags LIKE '%' :bar_tags '%'""" # db is sqlalchemy session object tags_res_list = db.execute(text(query_sql), {"bar_tags": bar_tags}).fetchall() 

Using PostgreSQL like (see accepted answer above) somehow didn't work for me although cases matched, but ilike (case insensisitive like) does.

In SQLAlchemy 1.4/2.0:

q = session.query(User).filter(User.name.like('e%'))