Update fields

[gswifort]

How to update all fields in model? i tried this but it doesn't work:

for id in db.objectIds(Db.Field.desc()):
    field = Db.Field(id, Db.OpenMode.kForWrite)
    field.evaluate(Db.FieldEvalContext.kDemand)

[CEXT-Dan]

It does evaluate the field; it just does not update the graphic. You can check the value before and after evaluation
Fields are owned by a dictionary, which in turn, is owned by the entity, changing the field does not notify the entity that it’s been changed.

In AutoCAD, I would walk up the ownership and call recordGraphicsModified, however, it seems that ZwCAD has a bug, so your forced to regen
Test drawing 06457 has a bunch of fields linked to DWGPROPS, change the job number and you can see the fields do evaluate

from pyrx import Rx, Ge, Gi, Db, Ap, Ed, Ax, command

import operator


def get_all_field_ids(db: Db.Database):
    fieldSet = set()
    nod = Db.Dictionary(db.namedObjectsDictionaryId())
    fieldListId = nod.getAt("ACAD_FIELDLIST")
    fieldList = Db.Core.entGet(fieldListId)
    for code, id in fieldList:
        if code != Db.DxfCode.kDxfSoftPointerId:
            continue
        if not id.isDerivedFrom(Db.Field.desc()):
            continue
        fieldSet.add(id)
    return fieldSet


def update_parent_entity(id: Db.ObjectId):
    if id.isDerivedFrom(Db.Entity.desc()):
        ent = Db.Entity(id, Db.OpenMode.kForWrite)
        ent.recordGraphicsModified()
        ent.close()
        return
    dbo = Db.DbObject(id)
    ownerId = dbo.ownerId()
    dbo.close()
    update_parent_entity(ownerId)


@command
def doit():
    db = Db.curDb()
    for id in get_all_field_ids(db):
        field = Db.Field(id, Db.OpenMode.kForWrite)
        field.evaluate(Db.FieldEvalContext.kDemand)
        #print(field.getValue())
        update_parent_entity(field.ownerId())


@command
def doitZw():
    db = Db.curDb()
    for id in get_all_field_ids(db):
        field = Db.Field(id, Db.OpenMode.kForWrite)
        field.evaluate(Db.FieldEvalContext.kDemand)
        #print(field.getValue())
    Ed.Core.regen()

[CEXT-Dan]

the zip is empty

[gswifort]

sorry..
update_fields.zip

[CEXT-Dan]

looks like a bug in ZwCAD

test:

from pyrx import Rx, Ge, Gi, Db, Ap, Ed, Ax, command


def get_all_field_ids(db: Db.Database):
    fieldSet = set()
    nod = Db.Dictionary(db.namedObjectsDictionaryId())
    fieldListId = nod.getAt("ACAD_FIELDLIST")
    fieldList = Db.Core.entGet(fieldListId)
    for code, id in fieldList:
        if code != Db.DxfCode.kDxfSoftPointerId:
            continue
        if not id.isDerivedFrom(Db.Field.desc()):
            continue
        fieldSet.add(id)
    return fieldSet


def get_field_values(db: Db.Database):
    fieldSet = set()
    for id in get_all_field_ids(db):
        field = Db.Field(id, Db.OpenMode.kForWrite)
        r = field.evaluate(Db.FieldEvalContext.kDemand)
        v = field.getValue()
        fieldSet.add((r, v))
    return fieldSet


@command
def doitZw():
    db = Db.curDb()
    print("before", get_field_values(db))
    db.setInsunits(Db.UnitsValue.kUnitsAngstroms)
    print("after", get_field_values(db))

result

BricsCAD 
before {((1, 1), '5'), ((1, 0), '5')}
after {((1, 0), '11'), ((1, 1), '11')}

AutoCAD
before {((1, 1), '5')}
after {((1, 1), '11')}

GstarCAD
before {((1, 1), '5')}
after {((1, 1), '5'), ((1, 1), '11')}

ZwCAD
before {((0, 0), '5')}
after {((0, 0), '5')}

[gswifort]

😟
will you report it?

[CEXT-Dan]

i sent it

test code for reference

typedef AcDbObjectPointer<AcDbField> AcDbFieldPointer;

using AcResBufPtr2 = std::unique_ptr < resbuf, decltype([](resbuf* ptr) noexcept
    {
        acutRelRb(ptr);
    }) > ;

static Acad::ErrorStatus getFieldIds(AcDbObjectIdArray& fids)
{
    auto db = acdbCurDwg();
    if (db == nullptr)
        return Acad::eNullPtr;

    if (AcDbDictionaryPointer pNod(db->namedObjectsDictionaryId()); pNod.openStatus() == eOk && 
        pNod->has(_T("ACAD_FIELDLIST")))
    {
        AcDbObjectId fieldListId;
        if (auto stat = pNod->getAt(_T("ACAD_FIELDLIST"), fieldListId); stat != eOk)
            return stat;
        return getIdsFromAcDbFieldList(fieldListId, fids);
    }
    return eInvalidInput;
}

static Acad::ErrorStatus getIdsFromAcDbFieldList(const AcDbObjectId& fieldListId, AcDbObjectIdArray& fids)
{
    ads_name fdname = { 0L, 0L };
    if (auto stat = acdbGetAdsName(fdname, fieldListId); stat != eOk)
        return stat;
    AcResBufPtr2 pHead(acdbEntGet(fdname));
    for (resbuf* pTail = pHead.get(); pTail != nullptr; pTail = pTail->rbnext)
    {
        if (AcDbObjectId fId; pTail->restype == AcDb::kDxfSoftPointerId && 
            acdbGetObjectId(fId, pTail->resval.rlname) == eOk)
        {
            if (fId.objectClass()->isDerivedFrom(AcDbField::desc()))
                fids.append(fId);
        }
    }
    return eOk;
}

static void printFieldValues()
{
    auto db = acdbCurDwg();
    AcDbObjectIdArray fids;
    getFieldIds(fids);
    for (auto id : fids)
    {
        AcDbFieldPointer pField(id, AcDb::kForWrite);
        if (auto es = pField->evaluate(32, db); es != eOk)
            acutPrintf(_T("\nfail"));
        acutPrintf(_T("\n%ls"), pField->getValue());
    }
}

static void AcRxPyApp_idoit(void)
{
    auto db = acdbCurDwg();
    printFieldValues();
    db->setInsunits(AcDb::UnitsValue::kUnitsAngstroms);
    printFieldValues();
}

[CEXT-Dan]

I added these in Core, so when it's fixed, it should be fast

Db.Core.evaluateFields() #all ids, kDemand
Db.Core.evaluateFields( ids, context)

[CEXT-Dan]

ID SUP-80017