Difference between filter and filter_by in SQLAlchemy

Could anyone explain the difference between filter and filter_by functions in SQLAlchemy? Which one should I be using?

SQLAlchemy: How to group by two fields and filter by date

So I have a table with a datestamp and two fields that I want to make sure that they are unique in the last month. table.id table.datestamp table.field1 table.field2 There should be no duplicate...

SqlAlchemy - Filtering by Relationship Attribute

I don't have much experience with SQLAlchemy and I have a problem, which I can't solve. I tried searching and I tried a lot of code. This is my Class (reduced to the most significant code): class...

SQLAlchemy: how to filter date field?

Here is model: class User(Base): ... birthday = Column(Date, index=True) #in database it's like '1987-01-17' ... I want to filter between two dates, for example to choose all users...

SQLAlchemy and Postgresql: to_tsquery()

Does anyone know how to use to_tsquery() function of postgresql in sqlalchemy? I searched a lot in Google, I didn't find anything that I can understand. Please help. I hope it is available in...

SQLAlchemy default filter

I have a model with a field is_deleted, now I want all forms of query for this model to always filter by is_deleted=False in addition to whatever filtering arguments is passed to .filter and...

Flask - Convert request.args to dict

I've been trying to figure out how to pass the request.args to sqlalchemy filter. I thought this should work: model.query.filter(**request.args).all() But it's throwing the error: TypeError:...

sqlalchemy IS NOT NULL select

How can I add the filter as in SQL to select values that are NOT NULL from a certain column ? SELECT * FROM table WHERE YourColumn IS NOT NULL; How can I do the same with SQLAlchemy...

SQLAlchemy: adding Integer column to DateTime

Given a table class Order(db.Model): created_at = db.Column(db.DateTime) days = db.Column(db.Integer) I need to compose a query with FROM statement like this: Order.created_at + Order.days <...

SQLAlchemy lazy=dynamic with m2m relationship using association object pattern

I have a simple m2m relationship between users and roles tables: users_roles = db.Table('users_roles', db.Column('user_id', db.Integer, db.ForeignKey('users.id')), db.Column('role_id',...

When to use SQLAlchemy .get() vs .filter(Foo.ID == primary_key_id).first()

Just curious about when I would want to use one vs the other. How are they different? We have our system set up such that we can do this: my_user = User.query().filter(User.ID ==...

SQLAlchemy - "Dynamic Filter"

I have just started using SQLAlchemy. I decided to use it because I was using a lot of string expression in the middle of my sqlite queries. So, that is my problem. I have a table with many...

Filter by labelled column in union'd SQLAlchemy query

Realizing the title is nearly equivalent to https://stackoverflow.com/questions/34825773/how-to-use-a-labelled-column-in-sqlalchemy-filter I believe this is a separate issue. To vastly simplify my...

Filter by id in graphene-sqlalchemy query

How can you setup graphene-sqlalchemy to filter an object by id? I'd like to run the query: { marker(markerId: 1) { markerId title } } I would expect to get a single Marker object...

SQLAlchemy: How to filter after aggregation

How do I filter out all groups with aggregate share totals of 0? q = session.query(Trades.ticker, func.sum(Trades.shares)) g = q.group_by(Trades.ticker) f = g.filter(func.sum(Trades.shares) !=...

Datetime filtering with SQLAlchemy isn't working

Basically, I need to build a function that will filter a query according to given dates and return a new query. I'm new to SQLAlchemy, I looked up similar questions but I still got the same...

Trigram distance operations in sqlalchemy

I'm currently trying to use the pg_trgm operations % and <->. The GIN Indices on the columns are already available, but I can't find the sqlalchemy equivalent to the previously mentioned...

I get an error when get my Binary Data from Mysql db using SqlAlchemy

I faced on problem. Here i have this Model in my SqlAlchemy class ConfigArchive(Base): __tablename__ = 'config_archives' cluster_id = Column(String(SIZE_TEXT), ...

sqlalchemy to filter on list by table name and filters condition

I am using sqlalchemy ORM layer to communicate with RDS. Here this is common function for all tables to filter row. We pass table name, column to select, filters and date range. filter = {...

SqlAlchemy/mysql Optional Where clause

I have below mentioned method with an optional parameter: def _customer_resources_details(customer_id=''): try: res = session.query( ...

Select from table defined by SQLAlchemy declarative_base

I am working on FastAPI tutorial and I am trying to create tables using SQLAlchemy+Alembic+databases. In my main.py I have: from typing import List import databases import sqlalchemy from fastapi...

SQLalchemy filter cast datetime by day of week

I have a Datetime column and I am trying to filter that column by everything occurring on a Saturday. I can filter Datetime by casting it to a date and comparing it to a date string like...

SQLAlchemy many to many query ordering by and limiting the other table

I am trying to join 3 tables, (Movie, role, Actor). My code is executing without errors but when I try to print the data I can only access information on the first table. role = db.Table('role', ...

Partial UUID match in Python/SQLAlchemy

Trying to develop a script in Python/SQLAlchemy that can take a substring and partially match it against a UUID. For example: the string "d78d" would match...

Flask Sqlalchmey - Marshmallow Nested Schema fails for joins with filter ( where ) conditions

I'm currently making an API with get request to return a joined json data of models which has a relationship using flask, sqlalchemy and flask-sqlalchemy and flask-marshmallow. I have no issues...

SQLAlchemy filter for None/NULL Value - WORKS - but how to have it in_ a list?

I want to filter my data for None or in MySQL dialect NULL values in a column. This is easily done by: db.query(models.Data).filter(models.Data.multiplier == None).all() Well, but I am building a...

Querying for overlapping time ranges in SQLAlchemy and Postgres

I'm using Flask-SQLAlchemy to describe a Postgres database. Three related tables look like this (in part): from sqlalchemy.dialects.postgresql import TSTZRANGE class Shift(Base): ...

Applying where condition when using pandas read_sql_table() -SQLAlchemy

I want to use SQLAlchemy and Pandas to read a table from a Posgresql database into a Pandas dataframe using read_sql_table(). The SQL query to the database is similar to this: SELECT col1,col2...

Filter elements by optional lists of related elements

I have a feeling that I've made things more complex than they need to be - this can't possibly be such a rare case. It seems to me that it should be possible - or perhaps that I'm doing something...

is it possible to find class name given class variable

class A: var = 'hello' type(A.var) # returns: <class 'str'> A.var.__class__.__name__ # returns: 'str' vars(A) # returns: mappingproxy({'__module__':...