On Aug 13, 2010, at 8:19 AM, robert rottermann wrote:
hi there,
up to now I did use something like:
c = tblCompany.__table__.columns
COMPANY_FIELDS = [(k, c[k].type.get_col_spec()) for k in c.keys() if not
k=='id']
to build some dynamic forms for a web application.
now this breaks with an error:
AttributeError: 'VARCHAR' object has no attribute 'get_col_spec'
it seems to work still with MySQL but not with postgres. (maybe MySQL uses a
slightly older version out of the 6.xx serie)
what is the correct way to build a list of fields a table provides ?
get_col_spec() was removed in 0.6 and replaced with the compiler structure.
the string form of a type is available if you compile it against a dialect,
like type.compile(dialect=engine.dialect).
its not a great idea to rely upon the string form of a type for anything other
than issuing SQL since it changes based on dialect involved and arguments. if
you're needing a hash key or some kind of discriminator, use the type object or
its class by itself.
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