map 这个 object 与阵列的最佳方式

Question

I need to reach to the property: value in each drupal_internal__target_id: 2220, but i don't know how can i map to get that value. This is what i tried so far...

organismosId(){
// rel = data[0].relationships.organismo_auditado.data[0].meta.drupal_internal__target_id
// attr = included[0].attributes.drupal_internal__tid
this.buscadorService.getNodes()
.subscribe((data: InformesCounter) => {
    this.informesNode = data.data;
    const relationships = this.informesNode.map((data: { relationships: { organismo_auditado: { data: any; }; }; }) => data.relationships.organismo_auditado.data);
    console.log(relationships);
    const nodeRelationships = relationships.map((data: any) => data);
    console.log(nodeRelationships);
  })
}

And this is my JSON response of what i want to get:

The problem are the indexes like [0] and when i finally got there it returns undefined. Thanks

Answer 1

You can flat-map the overall data entries and internally map the data nodes inside the relationship metadata.

 const run = () => { const ids = data.flatMap(({ relationships: { organismo_auditado: { data } } }) => data.map(({ meta: { drupal_internal_target_id } }) => drupal_internal_target_id)); console.log(ids); }; const data = [{ relationships: { organismo_auditado: { data: [{ id: '41ff8a06-c678-4db0-aa68-7887fd318345', meta: { drupal_internal_target_id: 2220 } }] } } }, { relationships: { organismo_auditado: { data: [{ id: 'c677dcc2-b7b7-4bf9-8cbf-c8c6faf9aa6f', meta: { drupal_internal_target_id: 2221 } }] } } }]; run();

If you also want to include the ID, you can map objects:

 const run = () => { const ids = data.flatMap(({ relationships: { organismo_auditado: { data } } }) => data.map(({ id, meta: { drupal_internal_target_id } }) => ({ id, drupal_internal_target_id }))); console.log(ids); }; const data = [{ relationships: { organismo_auditado: { data: [{ id: '41ff8a06-c678-4db0-aa68-7887fd318345', meta: { drupal_internal_target_id: 2220 } }] } } }, { relationships: { organismo_auditado: { data: [{ id: 'c677dcc2-b7b7-4bf9-8cbf-c8c6faf9aa6f', meta: { drupal_internal_target_id: 2221 } }] } } }]; run();