Hi Mike,
Modifications of your test made to point to the actual database file I am
using worked. The only difference in your test versus my code is that my
ClinicalData class definition uses a Flask db.Model versus a straight
declarative_base. I'll need to play around with this a bit more.
Interesting.
Thanks!
Greg--
On Thu, Nov 10, 2016 at 8:33 PM, mike bayer <mike...@zzzcomputing.com>
wrote:
>
>
> On 11/10/2016 08:10 PM, horcle_buzz wrote:
>
>> I am using SQLAlchemy and am having an issue wrt to an SQLite error:
>>
>>
>> |
>> SQLiteDatetype only accepts Pythondate objects asinput.
>> [SQL:'SELECT anon_1.patient_sid AS sid FROM
>> (SELECT clinical_data.patient_sid AS patient_sid FROM clinical_data
>> WHERE clinical_data.event_date >= ?) AS anon_1']
>> |
>>
>>
>> I understand perfectly the meaning of the error, but I do not understand
>> why it is happening in my case.
>>
>
>
> nor do I. You'd need to provide a complete test. Here is one, modify it
> to show how you get your error.
>
>
> from sqlalchemy import *
> from sqlalchemy.orm import *
> from sqlalchemy.ext.declarative import declarative_base
> from datetime import datetime
>
> Base = declarative_base()
>
>
> class ClinicalData(Base):
> __tablename__ = 'clinical_data'
> id = Column(Integer, primary_key=True, autoincrement=True)
> patient_id = Column(Integer)
> event_date = Column(Date)
>
> e = create_engine("sqlite://", echo=True)
> Base.metadata.create_all(e)
>
>
> valdate = datetime.strptime('1776-01-01 00:00:00', "%Y-%m-%d
> %H:%M:%S").date()
>
> s = Session(e)
> s.add(ClinicalData(event_date=valdate))
> s.commit()
>
>
> print s.query(ClinicalData).filter(ClinicalData.event_date >=
> valdate).all()
>
>
>
>
>> The parameter that I am passing to do the date comparison in the query
>> above
>> |
>> clinical_data.event_date >=?
>> |
>> is set as:
>>
>>
>> |
>> valdate =datetime.strptime('1776-01-01 00:00:00',"%Y-%m-%d
>> %H:%M:%S").date()
>> |
>>
>>
>> and, I have validated that the data type of `valdate` is `<type
>> 'datetime.date'>`
>>
>> The class used to construct the query is:
>>
>> |
>> classClinicalData(db.Model):
>> __tablename__ ='clinical_data'
>> id =Column(Integer,primary_key=True,autoincrement=True)
>> patient_id =Column(Integer)
>> patient_sid =Column(Integer)
>> string_value =Column(String(255))
>> double_value =Column(Float)
>> data_type_id =Column(Integer)
>> event_date =Column(Date)
>> ontology_id =Column(Integer)
>> attribute_id =Column(Integer)
>> project_id =Column(Integer)
>> replaced_by_id =Column(Integer)
>> date_record_added =Column(DateTime)
>> parent =Column(Integer)
>> num_children =Column(Integer)
>> lft =Column(Integer)
>> rgt =Column(Integer)
>> |
>>
>>
>> The SQLAlchemy documentation for SQLite states (see [SQLAlchemy SQLite
>> documentation][1] <
>> http://docs.sqlalchemy.org/en/latest/dialects/sqlite.html>) that
>> "SQLAlchemy’s own DateTime and related types provide date formatting and
>> parsing functionality when SQlite is used..."
>>
>> Note that when I use `DateTime` as a data type in my class model on the
>> `event_date` attribute I get the following error
>> |
>> SQLiteDateTimetype only accepts Pythondatetime anddate objects asinput.
>> |
>>
>> For this I define
>> |
>> valdate =datetime.strptime('1776-01-01 00:00:00',"%Y-%m-%d %H:%M:%S")
>> |
>>
>> without the `date()` method. As expected, `type(valdate)` in this case
>> yields
>> |
>> <type'datetime.datetime'>
>> |
>>
>> I have tried every combination of creating the variable `valdate` with
>> the `event_date` attribute of my class.
>>
>> I am not asking how to convert my string object to a python datetime
>> object, nor am I asking what the error means. I am not sure exactly why
>> I keep getting this error when everything appears to be sufficiently
>> defined.
>>
>> --
>> SQLAlchemy -
>> The Python SQL Toolkit and Object Relational Mapper
>>
>> http://www.sqlalchemy.org/
>>
>> To post example code, please provide an MCVE: Minimal, Complete, and
>> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
>> description.
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>
> --
> SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
> To post example code, please provide an MCVE: Minimal, Complete, and
> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
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--
Greg M. Silverman
› flora-script <http://flora-script.grenzi.org/> ‹
› grenzi.org ‹
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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