Cannot convert string value 1.1 at position 1 for the field RFCFLOAT to type RFCTYPE_FLOAT

[guettli]

This snippet works:

# -*- coding: utf-8 -*
from __future__ import absolute_import, division, print_function, unicode_literals

from pyrfc import Connection

conn = Connection(...)

#import django
#django.setup()

result = conn.call(b'STFC_STRUCTURE', **{"IMPORTSTRUCT": {"RFCFLOAT": 1.1}})
print(result)

But if I uncomment the two django-lines, then it fails with this exception:

Traceback (most recent call last):
  File "tmp/float-error.py", line 11, in <module>
    result = conn.call(b'STFC_STRUCTURE', **{"IMPORTSTRUCT": {"RFCFLOAT": 1.1}})
  File "src/pyrfc/_pyrfc.pyx", line 415, in pyrfc._pyrfc.Connection.call
  File "src/pyrfc/_pyrfc.pyx", line 1650, in pyrfc._pyrfc.fillFunctionParameter
  File "src/pyrfc/_pyrfc.pyx", line 1700, in pyrfc._pyrfc.fillVariable
  File "src/pyrfc/_pyrfc.pyx", line 1662, in pyrfc._pyrfc.fillStructureField
  File "src/pyrfc/_pyrfc.pyx", line 1805, in pyrfc._pyrfc.fillVariable
pyrfc._exception.ExternalRuntimeError: RFC_CONVERSION_FAILURE (rc=22): key=RFC_CONVERSION_FAILURE, message=Cannot convert string value 1.1 at position 1 for the field RFCFLOAT to type RFCTYPE_FLOAT [MSG: class=, type=, number=, v1-4:=;;;]

Python 2.7

This is very strange, since importing django and calling django.setup() should not have any side-effects.

I am running the latest version of PyRFC (master from github).

[bsrdjan]

I could not reproduce with clean django settings:

import django # v 1.11.26 
from django.conf import settings
settings.configure()
django.setup()

print(pyrfc.__version__)

Could you please check if the issue happens with default django settings, like above?

If default settings works, I would start from activating your django application settings step by step, to localise the root cause.

[guettli]

I found what influences the way pyRFC works: locale

Insteand of importing django there is a simple way to force the error:

import locale
locale.setlocale(locale.LC_ALL, b'de_DE.UTF-8')

I hope you can reproduce it now.

I would suggest pyRFC avoids using the locale.

I hate the locale. I wrote my anger down, in the hope other will avoid it from scratch: https://github.com/guettli/programming-guidelines/blob/master/README.md#avoid-posix-locale

[guettli]

@bsrdjan Hi Sdrjan could you reproduce the error after setting the locale?

[bsrdjan]

Could you please check if the fix, works for your use-case? Float and Decimal are always accepted and strings only when decimal separator is correct, for the application locale. Grouping separators are not supported, application should handle.

Unit tests: test_datatypes.py#L618

[guettli]

@bsrdjan yes, I installed pyrfc from git master and the float issue is gone now. Thank you very much!