Get only what's change during the edit context

Tue, 12 Mar 2019 07:49:17 +0000

Hello Efficy Team,

I got a complex process where I need to do something with the "new element" of a detailDataSet, or the deleted elements of the detailDataSet during the edit context.

What is the best way retrieve only those element ?

Here is what I did :

    var k_project = Efficy.getEditKey(editHandle);
var relationTable = Efficy.entityCatalog.getRelationEntityTableName(ntProj, TEntityHandle);
var kElement = Efficy.entityCatalog.keyFieldName(TEntityHandle);

var dsDetails = Efficy.sqlQueryDataSet('select * from ' + relationTable + ' where k_project = :param1', k_project, 45);
var newDetails = Efficy.getDetailDataSet(editHandle, TEntityHandle);

var changesInTheEditContext = [];

if(dsDetails || !dsDetails.isEmpty()) {

    // the project is already committed. We need to get only the "new" one
    // for that, we filter the "new one" based on the "old one"

    var existing = [];
    dsDetails.first();
    while (!dsDetails.eof()) {
        existing.push(dsDetails.fieldByName(kElement).asFloat);
        dsDetails.next();
    }

    // ho yeah it is ugly. But seems that "not in ()" does not work
    newDetails.filter = kElement +' <> ' + existing.join(' AND ' +  kElement +  ' <> ');
    newDetails.FilterOptions = existing.length;
    newDetails.Filtered = true;

}

// then we get, for each "new one", useful information's : entity, key, name

if(newDetails.isEmpty() || !newDetails) return false;
newDetails.first();

while(!newDetails.eof()) {

    changesInTheEditContext.push({
        entity : Efficy.entityCatalog.getEntityName(TEntityHandle),
        key : newDetails.fieldByName(kElement).asFloat,
        name : getName(newDetails.fieldByName(kElement).asFloat, TEntityHandle),
        operation : 'add'
    })

    newDetails.next();
}

newDetails.Filtered = false;

// we also need to detect the opposite : a contact deleted during the edit context
// we use the same ticks, but in the opposite (current detailDataSet filter the SQL)

if(dsDetails || !dsDetails.isEmpty()) {

    var fromRelationTable = [];

    newDetails.first();
    while (!newDetails.eof()) {

        fromRelationTable.push(newDetails.fieldByName(kElement).asFloat);
        newDetails.next();

    }

    // ho yeah it is ugly. But seems that "not in ()" does not work
    dsDetails.filter = kElement +' <> ' + fromRelationTable.join(' AND ' +  kElement +  ' <> ');
    dsDetails.FilterOptions = fromRelationTable.length;
    dsDetails.Filtered = true;

    if(dsDetails.isEmpty() || !dsDetails) return false;
    dsDetails.first();

    while(!dsDetails.eof()) {

        changesInTheEditContext.push({
            entity : Efficy.entityCatalog.getEntityName(TEntityHandle),
            key : dsDetails.fieldByName(kElement).asFloat,
            // name : getName(newDetails.fieldByName(kElement).asFloat, TEntityHandle), -- we don't need the name, he's already displayed
            operation : 'delete'
        })

        dsDetails.next();
    }

    dsDetails.Filtered = true;

}

return changesInTheEditContext;

Is there, by any chance, a way to get those change in a more "Efficy way" than comparing two dataSet ?

Regards,

Loïc

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Get only what's change during the edit context