Fix Form.proxifyField creating inconsistent proxy fields
When `Form.proxifyField` is used to make a proxy field from a field which has only a TALES and no value, it creates a proxy field with inconsistent internal data structures where `has_value` method does not work as expected. As a consequence, proxy fields to list fields are often broken in the ods/odt rendering. Here is a scenario to reproduce the problem: * add `Base_viewDummyFieldLibrary` ERP5 Form * add a `LinesField`, with id `your_test_base_field`. Change `size` to 1 (not really required but I did this in screenshots here) * add another `LinesField`, with id `your_test_field` and in this field: * set a `default` (`2`) in values, it's only needed to visualise the problem in ods style: ![set default and no items](/uploads/0cb9e229b0ca6761bb15f3d8845ea3f8/image.png) * set `items` in TALES (`python: [('one', '1'), ('two', '2')]`) , this will be the problem ![set items in TALES](/uploads/93d90f57e15afdcca60324675b59086a/image.png) * So far, when this is rendered as ODS, everything is fine: ![ODS before](/uploads/ce387cd7a5146585104470bf099f890b/image.png) this is also what we see in html style view: ![html before](/uploads/650330951ed286576f8366bbd5c44139/image.png) * use the proxify action, to make `your_test_field` be a proxy field to `your_test_base_field` ![proxify action](/uploads/9ff7b29141ce7f170f340c842fd76830/image.png) * result of proxify action looks good, both for values: ![values after proxify](/uploads/a9f7df3cd2d0af1e036aeff352624760/image.png) and for TALES: ![TALES after proxify](/uploads/aeaaa45cc9e91e9327781d85ec1efd57/image.png) * but after this rendering the form with ODS becomes broken: ![ODS after proxify](/uploads/d4e7be3251c596de35333526d4f6277a/image.png) even though it looks fine with html views. `erp5_ods_style` knows how to render list fields and it uses the "display" (two) and not the "value" (2), this is done [here](https://lab.nexedi.com/nexedi/erp5/blob/451ce4137dc1d006bc2cd155535523d51a928150/bt5/erp5_ods_style/SkinTemplateItem/portal_skins/erp5_ods_style/field_ods_macro.zpt#L60) with a check depending on `field.has_value("items")`. `has_value` is implemented like [this](https://lab.nexedi.com/nexedi/erp5/blob/451ce4137dc1d006bc2cd155535523d51a928150/product/ERP5Form/ProxyField.py#L598-611) for proxy fields: ```python def has_value(self, id): """ Return true if the field defines such a value. """ result = None if (id in self.widget.property_names) or \ (not self.is_delegated(id)): result = ZMIField.has_value(self, id) else: proxy_field = self.getTemplateField() if proxy_field is not None: result = proxy_field.has_value(id) return result ``` and like [this](https://lab.nexedi.com/nexedi/erp5/blob/451ce4137dc1d006bc2cd155535523d51a928150/product/Formulator/Field.py#L80-86) for traditional fields: ```python def has_value(self, id): """Return true if the field defines such a value. """ if self.values.has_key(id) or self.form.has_field(id): return 1 else: return 0 ``` when the value is defined on the proxy field and not delegated to template field, the condition is `self.values.has_key(id)`. But `Form.proxifyField` when transforming a traditional field in a proxy field does not keep the `id` in `self.values` if it's only needed in `self.tales`. This is the root cause of this problem, if we inspect the field, it is something like this: ``` (Pdb) self <ProxyField at /erp5/portal_skins/custom/Base_viewDummyFieldLibrary/your_test_field> (Pdb) pp self.tales {'field_id': '', 'form_id': '', 'items': <Products.Formulator.TALESField.TALESMethod object at 0x7ffa705c7450 oid 0x572626 in <Connection at 7ffa42c1a610>>} (Pdb) pp self.values {'default': '2', 'field_id': 'your_test_base_field', 'form_id': 'Base_viewDummyFieldLibrary', 'title': 'Test Field'} (Pdb) self.has_value('items') 0 (Pdb) ``` If we edit the proxy field, it will repair itself, because the proxy field edit method maintain `self.tales` and `self.values` consistent, but this is not the case with`Form.proxifyField`, which mutate directly `.tales` and `.values` and can make them have different keys - which is not supposed to happen. The problem is that most of the proxy fields we have have been generated by `Form.proxifyField`, so for most of our fields the XML data of business template has this inconsistency. We could have took the easy way and make change `ProxyField.has_value` to understand this case, but it's probably better to fix the data. `erp5_hal_json` also uses `field.has_value` in some places, so it's better to fix at field level and not to address this in `erp5_ods_style` and `erp5_odt_style`. These changes: - add a little more test coverage for `ProxyField.has_value` ( at first I thought the problem was only in `has_value`) - Fix `Form.proxifyField` - add a `ProxyField.checkConsistency` to check that `.values` and `.tales` are in sync - or more exactly that all entries from `.tales` are also in `.values`, because this is what cause the problem with `has_value`. - re-export all proxy fields after cleaning up their `.values` and `.tales`, using `checkConsistency(fixit=True)` on all proxy fields. See merge request nexedi/erp5!1352
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