flask-sqlalchemy

I have a running Flask application that is set up according to a combination of best practices we found online and in Miguel Grinberg's "Flask Web Development" book. We now need a second Python application, that is NOT a web app, and that needs access to the same models as the Flask application. We wanted to re-use the same models ofcourse, so both apps can benefit from the shared code. We have removed dependencies on the flask-sqlalchemy extention (which we used before, when we had just the Flask application). And replaced it with the SQLalchemy Declarative extension described here , which is

I have a specify use case but my question pertains to the best way of doing this in general. I have three tables Order - primary key order_id OrderLine - Linking table with order_id, product_id and quantity. An order has 1 or more order lines Product - primary key product_id, each order line has one product In sqlachemy / python how do I generate nested JSON along the lines of: { "orders": [ { "order_id": 1 "some_order_level_detail": "Kansas" "order_lines": [ { "product_id": 1, "product_name": "Clawhammer", "quantity": 5 }, ... ] }, ... ] } Potential Ideas Hack away doing successive queries

How can I use sqlalchemy on a database where the column names (and table names) have spaces in them? db.auth_stuff.filter("db.auth_stuff.first name"=='Joe') obviously can't work. Rather than manually define everything when doing the reflections I want to put something like lambda x: x.replace(' ','_') between existing table names being read from the db, and being used in my models. (It might also be useful to create a general function to rename all table names that won't work well with python - reserved words etc.) Is there an easy/clean way of doing this? I think I need to define my own

I am working with two MySQL Databases. I want to join a table from DB 1 with a table from DB2 in SQLAlchemy. I am using automap_base while creating data access layer in sqlalchemy as follows... class DBHandleBase(object): def __init__(self, connection_string='mysql+pymysql://root:xxxxxxx@localhost/services', pool_recycle=3600): self.Base_ = automap_base() self.engine_ = create_engine(connection_string, pool_recycle = pool_recycle) self.Base_.prepare(self.engine_, reflect=True) self.session_ = Session(self.engine_) And my tables Class is like class T1D1_Repo(): def __init__(self, dbHandle): #

One feature I have been struggling to implement in flask-admin is when the user edits a form, to constrain the value of Field 2 once Field 1 has been set. Let me give a simplified example in words (the actual use case is more convoluted). Then I will show a full gist that implements that example, minus the "constrain" feature. Let's say we have a database that tracks some software "recipes" to output reports in various formats. The recipe table of our sample database has two recipes: "Serious Report", "ASCII Art". To implement each recipe, we choose one among several methods. The method table