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I am learning to use SQL alchemy to connect to a mysql database. I want to pull records from the DB that start with a given string. I know that for simple equality all I need to do is this
queryRes = ses.query(Table).filter(Tablee.fullFilePath == filePath).all() result = [] How do I do something like this?
queryRes = ses.query(Table).filter(Table.fullFilePath.startsWith(filePath)).all() result = [] Maybe the query would look like this?
q = ses.query(Table).filter(Table.fullFilePath.like('path%')).all() 
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first() applies a limit of one within the generated SQL, so that only one primary entity row is generated on the server side (note this may consist of multiple result rows if join-loaded collections are present). Calling Query. first() results in an execution of the underlying query.
Python Flask and SQLAlchemy ORM All SELECT statements generated by SQLAlchemy ORM are constructed by Query object. It provides a generative interface, hence successive calls return a new Query object, a copy of the former with additional criteria and options associated with it.
all() will return all records which match our query as a list of objects.
The select() method of table object enables us to construct SELECT expression. The resultant variable is an equivalent of cursor in DBAPI. We can now fetch records using fetchone() method. Here, we have to note that select object can also be obtained by select() function in sqlalchemy.
SQLAlchemy has a startswith column property, so it works exactly as you'd think:
queryRes = ses.query(Table).filter(Table.fullFilePath.startswith(filePath)).all() If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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