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我正在尝试从 USDA API 中提取“能源”，如下面的控制台日志所示。

0: {nutrient: {…}, type: "FoodNutrient"}
1: {type: "FoodNutrient", nutrient: {…}, foodNutrientDerivation: {…}, id: 1837207, amount: 87.58, …}
2:
amount: 39
dataPoints: 0
foodNutrientDerivation: {id: 49, code: "NC", description: "Calculated", foodNutrientSource: {…}}
id: 1837206
nutrient: {id: 1008, number: "208", name: "Energy", rank: 300, unitName: "kcal"}
type: "FoodNutrient"
proto: Object

这是我的 CalculateNutritionInfo 函数：

CalculateNutritionInfo = () => {
let meals = ["Breakfast", "Lunch", "Dinner", "Snacks"];
let { reports } = this.state;
let nutrient = {};
meals.forEach((meal) => {
  this.state[meal].forEach((item) => {
    nutrient = this.FillNutrients(
      nutrient,
      reports[item.foodNutrients],
      item.servings
    );
    console.log(reports[item.foodNutrients]);
  });
});
console.log(nutrient);
let nutrientList = Object.keys(nutrient).map((item) => nutrient[item]);
console.log(nutrientList);
let empty = nutrientList.length === 0 ? true : false;
this.setState({
  calories: empty ? 0 : nutrient["Energy"].amount,
  protein: empty ? 0 : nutrient["Protein"].value,
  fat: empty ? 0 : nutrient["Total lipid (fat)"].value,
  carbs: empty ? 0 : nutrient["Carbohydrate, by difference"].value,
  nutrientList,
});

};

这是我的 FetchReports 函数：

  FetchReports = () => {
let uri = encodeURI(
  `https://api.nal.usda.gov/fdc/v1/foods?api_key=[my_key]${this.state.ndbno_list}`
);
fetch(uri, {
  mode: "cors",
})
  .then((res) => res.json())
  .then((data) => {
    let reports = {};
    data.forEach((item) => {
      reports[item.foodNutrients.nutrient] = item.foodNutrients;
    });
    this.setState(
      {
        reports,
      },
      function () {
        this.CalculateNutritionInfo();
      }
    );
  });

};

这是我的 FillNutrients 函数：

  FillNutrients = (nutrients, foodNutrients, servings) => {
foodNutrients.forEach((nutrient) => {
  let { name, amount, unitName } = nutrient;
  servings = parseFloat(servings);
  servings = isNaN(servings) ? 0 : servings;
  let newValue = Math.round(parseFloat(amount) * servings);
  if (nutrients[name]) {
    nutrients[name].name = nutrient.nutrient.name;
    nutrients[name].amount = nutrient.amount;
    nutrients[name].unitName = nutrient.nutrient.unitName;
  } else {
    nutrients[name] = {
      name,
      amount: newValue,
      unitName,
    };
  }
});
return nutrients;

};

到目前为止，我只能获得阵列中的最后一种营养。我的 nutritionalList 被覆盖了，我不知道为什么。我将不胜感激任何帮助。

4

0 回答 0