Allow the object passage containing actions for each attribute.

[luizstacio]

In my case I have a list and i needed append this list in "insert_or_update" and if changing for the other method the method not attended my necessity, because I had atributes null.

/* First insert_or_update */
DynamoDB
    .table(TABLE)
    .insert_or_update({
      hash: 'USER:123',
      phones: ['9988999'],
      status: null 
    }, function (err, data) {
      if (err) throw (err);
      console.log(data);
    });

/* Second insert_or_update */
DynamoDB
    .table(TABLE)
    .insert_or_update({
      hash: 'USER:123',
      phones: ['99114999'],
      status: null 
    }, function (err, data) {
      if (err) throw (err);
      console.log(data);
    }, {
      phones: 'ADD'
    });

[adrianpraja]

Hi

I know about this limitation, I'll get back with a solution, however may not be a third parameter.

Thanks

[luizstacio]

Ok no problem, I make this for resolve my problem but I understand, not be better solution for this project.

Maybe something:

DynamoDB
    .table(TABLE)
    .actions({
       phones: 'ADD'
     })
    .insert_or_update({
      hash: 'USER:123',
      phones: ['99114999'],
      status: null 
    }, function (err, data) {
      if (err) throw (err);
      console.log(data);
    })

[adrianpraja]

I'm doing some tests now, will be publishing new npm version soon

what I'm testing now and hopefully makes sense, looks like this

DynamoDB
     .table(TABLE)
     .insert_or_update({
          hash: 'USER:123',
          unneded_attribute: DynamoDB.delete(),
          phones: DynamoDB.push('99114999'),
          profile_views: DynamoDB.increment(1),
          status: null
     }, function( err,data ) {
     })

[luizstacio]

This solution is pretty good, only one topic, I think "DynamoDB.add" make more sense. because the action in "DynamoDB.push or DynamoDB. increment" is the same.

[adrianpraja]

It's a bit tricky as having only add() will need to know if it operates on an array or number because they translate into different code

Also an array should support adding multiple values like .add( 5, 'aaa', {}, [] )

Same with delete() where we need to know if we need to delete the entire arrtibute or just some values from the array

[luizstacio]

Ok, I understand your suggestion now. =D Thanks for your attention in my necessity and congrats for this project.

[adrianpraja]

Updated, you can now use DynamoDB.add(number) to increment an attribute, DynamoDB.add([array]) to add elements to an attribute of list type DynamoDB.del() to remove attribute from an item

documentation updated aswell