Yes, this project is probably worth it. However at the moment I am looking to use my already implemented daterange logic instead of exploring a new library and having to refactor my codebase for it
Getting closer with this, adaptation is failing: class MyDateRange_(DATERANGE, DateRange): pass class MyDateRange(TypeDecorator): impl = MyDateRange_ On Friday, April 24, 2015 at 3:11:36 PM UTC+2, Richard Kuesters wrote: > > perhaps this could help you? > > > http://sqlalchemy-utils.readthedocs.org/en/latest/range_data_types.html#datetimerangetype > > > richard. > > > On 04/24/2015 10:09 AM, Dimitris Theodorou wrote: > > Hi, > > I am using psycopg2 and trying to put together a new daterange type that > combines the following: > > 1. A custom daterange class which provides various useful helpers > (backwards/forwards iteration, intersection). > 2. The psycopg2 DateRange that fills in with some helpers of its own > (contains, comparisons) and takes care of marshaling the object from/to the > db > 3. The DATERANGE sqlalchemy/postgres type to take care of emiting of SQL > operators and DDL, and so that I can use it both when querying and when > declaring Columns() > > So my naive approach is the following, going by the guideline at > http://docs.sqlalchemy.org/en/latest/core/compiler.html#subclassing-guidelines > : > > from psycopg2.extras import DateRange > from sqlalchemy.dialects.postgresql import DATERANGE > > class MyDateRange(TypeDecorator, DateRange): > > impl = DATERANGE > > def intersection(): > #... > > > This crashes when emitting a table.create() statement. > > When I look at the documentation on how to create/modify types I am left > dumfounded and I realize I would need a significant trial and error > investment to figure out how things work. Does anyone else have experience > with such an attempt? I'd rather not become an expert in sqlalchemy type > extension before I can make this work. > > Thanks, > Dimitris > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+...@googlegroups.com <javascript:>. > To post to this group, send email to sqlal...@googlegroups.com > <javascript:>. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. > > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
