some elastic pain

const bulkPostRecipe = data => {
  console.log('trying to execute bulk');
  client.bulk({ body: data }, (data1, data2) => console.log(data1, data2));
};

exports.onPostBuild = async ({ getNodes }) => {
  console.log('on post build');

  const nodes = getNodes();
  const recipes = nodes.filter(node => node.internal.type === 'Recipe');
  const batchSize = 10;
  const noOfBatches = Math.ceil(recipes.length / batchSize);
  let startItem = 0;
  for (let i = 0; i < noOfBatches; i++) {
    const endItem = startItem + batchSize;
    const bulkRows = [];
    recipes.slice(startItem, endItem).forEach(recipe => {
      if (recipe) {
        // each datarow requires a header row like the belwo
        const headerRow = {
          index: {
            _index: keys.elasticSearch.index,
            _type: '_doc',
            _id: recipe.recipeId,
          },
        };
        bulkRows.push(headerRow);
        const dataRow = {
          id: recipe.recipeId,
          title: recipe.title,
        };
        bulkRows.push(dataRow);
      }
    });
    // format required by ES needs newline at end of each row
    bulkRows.length && bulkPostRecipe(bulkRows);
    if (endItem > recipes.length) break;
  }
};