Re: [Generateds-users] GenerateDS Question -- django and Python 3

Tue, 28 Feb 2017 16:22:38 -0800 

Shane,

Oops.  I did not get this on my to-do list, and forgot it.  I
apologize.

With respect to the duplicate names, I read this in the Django docs:

    ForeignKey.related_name

    The name to use for the relation from the related object back to
    this one. It’s also the default value for related_query_name (the
    name to use for the reverse filter name from the target model). See
    the related objects documentation for a full explanation and
    example. Note that you must set this value when defining relations
    on abstract models; and when you do so some special syntax is
    available.

    If you’d prefer Django not to create a backwards relation, set
    related_name to '+' or end it with '+'.

Do you think there is any harm in *always* generating a related
name?  That should be easy to do.  Would it be objectionable to have
the `related_name` parameter even when not needed?

With respect to the optional items, I can add the generation of
", blank=True, null=True" whenever we have minOccurs="0".  Or, at
least I think I can.  I have to figure out how to determine whether
minOccurs is zero.  Might have to pass an additional piece of info
from earlier in the process.

[a bit later] Looks like that piece of information (minOccurs) is
not in the module generated by generateDS.py, which is used to
generate the `models.py` file, and would have to be added.  It seems
a bit icky to add that just for this one use, although that would
work, I suppose.  I need to study it a bit more to see if there is a
cleaner way.  Or, maybe convince myself that adding that piece of
information (minOccurs) would be a good thing in any case.  [just
thinking out loud]

Give me a little more time, and I'll send you a patch, I hope.

Dave

On Tue, Feb 28, 2017 at 12:28:51PM +1100, Shane Rigby wrote:
>    Hi Dave,
> 
>    I responded on Jan 13 but have not heard back. Did my response answer your
>    question fully?
>    On Fri, Jan 13, 2017 at 1:16 PM, Shane Rigby <[email protected]> wrote:
> 
>      Sorry- I didn't quite answer your question... "Is there something in the
>      XML schema that would tell us that we need
>      to generate the chances you had to make by hand?"
> 
>      Yes there is - If there are any sibling elements that use the same type
>      and that type is a complextype need to be treated differently.
>       
>      Does this help?
>      On Thu, Jan 12, 2017 at 8:22 AM, Shane Rigby <[email protected]>
>      wrote:
> 
>        Thanks Dave,
> 
>        Here is a very small subset of one of the xsd's we can use as an
>        example.
> 
>        You can see the following three elements all use the same type
>        (phoneType)
> 
>        Package/Person/Contact/HomePhone
>        Package/Person/Contact/Mobile
>        Package/Person/Contact/WorkPhone
> 
>        Cheers,
> 
>        Shane
> 
>        On Wed, Jan 11, 2017 at 6:41 PM, Dave Kuhlman
>        <[email protected]> wrote:
> 
>          Shane,
> 
>          Is there something in the XML schema that would tell us that we need
>          to generate the chances you had to make by hand?  If so, could you
>          share your XML schema with me, or at least the element definition
>          that you are talking about?  If I had the schema, I would
>          hopefully able to try to generate the changes that you made
>          manually.
>          Dave
> 
>          On Tue, Jan 10, 2017 at 09:00:03AM -0500, Shane Rigby wrote:
>          >    Hi Dave,
>          >
>          >    I'm really enjoying playing around with all this - I just
>          wish I had more
>          >    time to commit to it.
>          >
>          >    In my schema, there are elements that represent a person,
>          each can have a
>          >    HomePhone and Mobile and a WorkPhone that use a single
>          complex type.
>          >
>          >    The GenerateDS created model file has duplicate foreign keys
>          so I needed
>          >    to manually update the model class to include a unique
>          related_name.
>          >
>          >    In addition, my model has a lot of non-mandatory elements and
>          attributes,
>          >    so I had to manually add blank=True, null=True to all the
>          attributes I
>          >    need to be non-mandatory.
>          >
>          >    So for example, I changed the following:
>          >    class ContactType16_model(models.Model):
>          >        HomePhone = models.ForeignKey("phoneType_model")
>          >        Mobile = models.ForeignKey("phoneType_model")
>          >        WorkPhone = models.ForeignKey("phoneType_model")
>          >    To this:
>          >
>          >    class ContactType16_model(models.Model):
>          >        HomePhone = models.ForeignKey("phoneType_model",
>          >    related_name="ContactType16_model_HomePhone", blank=True,
>          null=True)
>          >        Mobile = models.ForeignKey("phoneType_model",
>          >    related_name="ContactType16_model_Mobile", blank=True,
>          null=True)
>          >        WorkPhone = models.ForeignKey("phoneType_model",
>          >    related_name="ContactType16_model_WorkPhone", blank=True,
>          null=True)
>          >    Have you had anyone else that noted this kind of problem?
>          >
>          >    Cheers,
>          >
>          >    Shane
>          >
>          >    On Thu, Jan 5, 2017 at 6:03 PM, Shane Rigby
>          <[email protected]> wrote:
>          >
>          >      Thanks Dave,
>          >
>          >      Again - I really appreciate it.
>          >
>          >      Now the model, forms and admin files generate
>          successfully!
>          >
>          >      I'm getting some errors with Django though - there seems
>          to be some
>          >      conflicts - 30 errors like this:
>          >
>          >      "polls.ContactType16_model.HomePhone: (fields.E304)
>          Reverse accessor for
>          >      'ContactType16_model.HomePhone' clashes with reverse
>          accessor for
>          >      'ContactType16_model.Mobile'."
>          >
>          >      I'll dig a little deeper to figure it out - as I mentioned
>          before I am
>          >      new to Django.
>          >      Out of interest do use any of the continuous integration
>          and deployment
>          >      features of BitBucket? I've been using the GitLab CI
>          Runner using docker
>          >      container runners on hyper.sh for all my automation, but
>          I've got no
>          >      idea about what bitbucket offers.
>          >      Cheers,
>          >
>          >      Shane
>          >
>          >      On Thu, Jan 5, 2017 at 3:22 PM, Dave Kuhlman
>          <[email protected]>
>          >      wrote:
>          >
>          >        Shane,
>          >
>          >        Thanks for catching this issue.
>          >
>          >        I've added the following simple types to those
>          supported by the
>          >        Django code generator: xsd:gYear, xsd:gYearMonth,
>          xsd:gMonth,
>          >        xsd:gMonthDay, and xsd:gDay.  Each of these XML schema
>          simple types
>          >        will generate:
>          >
>          >          - django.db.models.DateField (in the generated
>          Django  models
>          >        module)
>          >          - django.forms.DateField (in the generated Django
>          forms module)
>          >
>          >        Django does not have more specific types for year,
>          year-month,
>          >        month, month-day, and day that I could find.  If you
>          find them, let
>          >        me know.
>          >
>          >        I've also added the xsd:time simple type so that the
>          XML schema simple
>          >        types xsd:dateTime and xsd:time generate the Django
>          DateTimeField and
>          >        TimeField respectively.
>          >
>          >        You can look at the following for information on XML
>          schema simple
>          >        types:
>          https://www.w3.org/TR/xmlschema-0/#SimpleTypeFacets
>          >
>          >        If you spot additional simple types in that table that
>          you feel we
>          >        should also support, but do not, let me know.
>          >
>          >        I've pushed this change to the Bitbucket repository at:
>          >        https://bitbucket.org/dkuhlman/generateds.  And, I've
>          attached a
>          >        distribution file in a separate email.
>          >
>          >        I've attached the XML schema file that I used for my
>          tests.  You can
>          >        run it with any of the following command lines:
>          >
>          >            $ python gends_run_gen_django.py test01.xsd
>          >            $ python gends_run_gen_django.py --force
>          test01.xsd
>          >            $ python3 gends_run_gen_django.py test01.xsd
>          >            $ python3 gends_run_gen_django.py --force
>          test01.xsd
>          >        Dave
>          >
>          >        On Wed, Jan 04, 2017 at 08:44:25PM -0500, Shane Rigby
>          wrote:
>          >        >    Thanks Dave,
>          >        >
>          >        >    That's great - I really appreciate it.
>          >        >
>          >        >    That is now running through now, but I get an
>          warning/error
>          >        where my
>          >        >    schema uses a type of gYear
>          >        >    (http://www.datypic.com/sc/xsd/t-xsd_gYear.html)
>          and it gives a
>          >        >    warning/error of "Unhandled simple type: Year
>          gYear". Is this a
>          >        known
>          >        >    limitation?
>          >        >
>          >        >    Cheers,
>          >        >
>          >        >    Shane
>          >        >    On Wed, Jan 4, 2017 at 1:01 PM, Dave Kuhlman
>          >        <[email protected]>
>          >        >    wrote:
>          >        >
>          >        >      Shane,
>          >        >
>          >        >      My testing shows that the Django support now
>          runs under both
>          >        Python 2
>          >        >      and Python 3.
>          >        >
>          >        >      I've attached a distribution file containing
>          these fixes in
>          >        a
>          >        >      separate email.  You can also find the
>          Mercurial repository
>          >        with
>          >        >      these fixes at:
>          https://bitbucket.org/dkuhlman/generateds
>          >        >
>          >        >      If and when you try it, please let me know
>          about the
>          >        results, and
>          >        >      about any other suggestions and ideas you
>          have on
>          >        generateDS, too.
>          >        >
>          >        >      If you have not seen it already, take a look
>          at:
>          >        >     
>          >       
>          
> http://www.davekuhlman.org/generateDS.html#django-generating-models-and-forms
>          >        >
>          >        >      And, the gends_run_gen_django.py script,
>          which automates the
>          >        >      generation process, may be helpful, too.
>          >        >      Dave
>          >        >
>          >        >      On Mon, Jan 02, 2017 at 06:20:54PM -0500,
>          Shane Rigby wrote:
>          >        >      >    Hi Dave,
>          >        >      >
>          >        >      >    That's awesome!
>          >        >      >
>          >        >      >    I look forward to hearing further from
>          you - I'm
>          >        running a docker
>          >        >      >    container on hyper.sh that contains a
>          gitlab runner
>          >        (our schema
>          >        >      is in
>          >        >      >    GitLab) that automatically generates
>          the python
>          >        classes using
>          >        >      GenerateDS
>          >        >      >    so I can quickly create test case xmls
>          from Excel. If
>          >        I can get
>          >        >      the Django
>          >        >      >    part working, I'd like to auto-deploy
>          the whole
>          >        shebang!  It
>          >        >      would be
>          >        >      >    really neat.
>          >        >      >
>          >        >      >    Anyway, let me know if you want me to
>          test anything -
>          >        happy to
>          >        >      help in any
>          >        >      >    way I can.
>          >        >      >    On Mon, Jan 2, 2017 at 4:59 PM, Dave
>          Kuhlman
>          >        >      <[email protected]>
>          >        >      >    wrote:
>          >        >      >
>          >        >      >      Shane,
>          >        >      >
>          >        >      >      Good to hear from you.  Sounds
>          like you are doing
>          >        some
>          >        >      interesting
>          >        >      >      work with XML.
>          >        >      >
>          >        >      >      Thanks for reporting the problems
>          which the Django
>          >        support and
>          >        >      >      Python 3.  I'll look into that.
>          >        >      >
>          >        >      >      OK.  I've done a little work on
>          the Python 3
>          >        support for
>          >        >      Django.  I
>          >        >      >      got the modules that generate the
>          Django code to
>          >        run
>          >        >      successfully
>          >        >      >      under both Python 2 and Python 3. 
>          And, I believe
>          >        that the
>          >        >      generated
>          >        >      >      files (models.py, forms.py, and
>          admin.py),
>          >        themselves are
>          >        >      Python 3
>          >        >      >      compatible.  Give me a little time
>          to do some
>          >        more checking
>          >        >      and then
>          >        >      >      I'll
>          >        >      >      pass them along to you, hopefully
>          tomorrow (my
>          >        time/date in
>          >        >      >      California, U.S.A).
>          >        >      >
>          >        >      >      About whether I know of anyone
>          working in this
>          >        area, I'm not
>          >        >      sure
>          >        >      >      what you mean by "this area".  If
>          you mean using
>          >        the Django
>          >        >      support
>          >        >      >      provided by generateDS, I usually
>          only get reports
>          >        when
>          >        >      something is
>          >        >      >      not working.  I've had several of
>          those in the
>          >        past, and have
>          >        >      been
>          >        >      >      able to fix the reported
>          problems.  But I don't
>          >        know where
>          >        >      those
>          >        >      >      projects went after that.
>          >        >      >
>          >        >      >      More later when I have a fix for
>          you.
>          >        >      >
>          >        >      >      Dave
>          >        >      >
>          >        >      >      On Sat, Dec 31, 2016 at 10:20:33AM
>          -0500, Shane
>          >        Rigby wrote:
>          >        >      >      > Hi Dave,
>          >        >      >      >
>          >        >      >      > I work for a LIXI a non-profit in
>          Australia that
>          >        manages the
>          >        >      xml data
>          >        >      >      > standards that are used widely
>          for applying for
>          >        residential
>          >        >      mortgages
>          >        >      >      in
>          >        >      >      > Australia. Simply put, we publish
>          xsd schema for
>          >        our members
>          >        >      to use to
>          >        >      >      > transmit credit applications to
>          each other.
>          >        >      >      >
>          >        >      >      > I've been learning python and
>          trying out your
>          >        project
>          >        >      GenerateDS to
>          >        >      >      > generate python code to create
>          and read
>          >        messages. I've been
>          >        >      trying to
>          >        >      >      get
>          >        >      >      > the Django model generation
>          working but notice
>          >        there is some
>          >        >      Python2
>          >        >      >      > specific code that is causing me
>          problems (I'm
>          >        using
>          >        >      Python3).
>          >        >      >      >
>          >        >      >      > Do you know if anyone is working
>          in this area?
>          >        >      >      >
>          >        >      >      > I'm really new to open-source and
>          trying to
>          >        figure out how
>          >        >      to best
>          >        >      >      > contribute (I'm really pretty new
>          to Python).
>          >        >      >      >
>          >        >      >      > Cheers,
>          >        >      >      >
>          >        >      >      > Shane
>          >        >      >
>          >        >      >      --
>          >        >      >
>          >        >      >      Dave Kuhlman
>          >        >      >      http://www.davekuhlman.org
>          >        >
>          >        >      --
>          >        >
>          >        >      Dave Kuhlman
>          >        >      http://www.davekuhlman.org
>          >
>          >        --
>          >
>          >        Dave Kuhlman
>          >        http://www.davekuhlman.org
> 
>          --
> 
>          Dave Kuhlman
>          http://www.davekuhlman.org

-- 

Dave Kuhlman
http://www.davekuhlman.org

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