null value results in two identical rows not being merged
See original GitHub issueWhen rows contain a field with a null value, they are treated as different values and even though the rows should be merged, they are not.
// Treeize turns flat associative data (as from SQL queries) like this:
var peopleData = [
{
'name': 'John Doe',
'age': null,
'pets:name': 'Rex',
'pets:type': 'dog',
'pets:toys:type': 'bone'
},
{
'name': 'John Doe',
'age': null,
'pets:name': 'Rex',
'pets:type': 'dog',
'pets:toys:type': 'ball'
},
{
'name': 'Mary Jane',
'age': 19,
'pets:name': 'Mittens',
'pets:type': 'kitten',
'pets:toys:type': 'yarn'
},
{
'name': 'Mary Jane',
'age': 19,
'pets:name': 'Fluffy',
'pets:type': 'cat'
}
];
// ...via a dead-simple implementation:
var Treeize = require('treeize');
var people = new Treeize();
people.grow(peopleData);
// ...into deep API-ready object graphs like this:
console.log(people.getData());
[ { name: 'John Doe', pets: [ [Object] ] },
{ name: 'John Doe', pets: [ [Object] ] },
{ name: 'Mary Jane', age: 19, pets: [ [Object], [Object] ] } ]
Or am I missing something ?
Issue Analytics
- State:
- Created 8 years ago
- Reactions:6
- Comments:5
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I had the same problem with the null column value (for a deleted date which is null 99% of the time). It is fixable with the workaround to suffix the column name with ‘*’, it is documented here https://github.com/kwhitley/treeize#specifying-your-own-keyblueprint-for-collections
For anyone running into this, the treeize inspired flatToTrees seems handle null values better.