Function splitPopulateQuery

lib/helpers/populate/splitPopulateQuery.js:43–72

(mod, ids, select, assignmentOpts)

 */

function splitPopulateQuery(mod, ids, select, assignmentOpts) {
  if (mod.docs.length <= 1) {
    return null;
  }
  const perDocumentLimit = mod.options.perDocumentLimit == null ?
    get(mod.options, 'options.perDocumentLimit', null) :
    mod.options.perDocumentLimit;
  const numInFilterElements = ids.length * mod.foreignField.size;
  if (perDocumentLimit == null && (numInFilterElements <= splitPopulateQuery.maxInFilterLength || mod.isRefPath)) {
    return null;
  }

  return mod.docs.map((doc, i) => {
    const subMod = {
      ...mod,
      docs: [doc],
      ids: [mod.ids[i]],
      allIds: [mod.allIds[i]],
      unpopulatedValues: [mod.unpopulatedValues[i]],
      match: Array.isArray(mod.match) ? [mod.match[i]] : mod.match,
      _assignFromOwnResults: !mod.isRefPath
    };
    let subIds = utils.array.flatten(subMod.ids, flatten);
    subIds = utils.array.unique(subIds);
    const match = subIds.length === 0 || subIds.every(utils.isNullOrUndefined) ?
      null :
      createPopulateQueryFilter(subIds, subMod.match, subMod.foreignField, subMod.model, subMod.options.skipInvalidIds);
    return [subMod, match, select, assignmentOpts];
  });
}

/*!
 * ignore