如何创建React搜索过滤器以搜索多个对象键值

Question

我想为我的数据数组创建一个搜索过滤器。它具有多个对象和键，例如：

[
    {
        "fname": "Jayne",
        "lname": "Washington",
        "email": "jaynewashington@exposa.com",
        "gender": "female"
    },
    {
        "fname": "Peterson",
        "lname": "Dalton",
        "email": "petersondalton@exposa.com",
        "gender": "male"
    },
    {
        "fname": "Velazquez",
        "lname": "Calderon",
        "email": "velazquezcalderon@exposa.com",
        "gender": "male"
    },
    {
        "fname": "Norman",
        "lname": "Reed",
        "email": "normanreed@exposa.com",
        "gender": "male"
    }
]

我想要搜索过滤器搜索此数组上的任何地方。例如：当我输入框时，我想搜索对象内的任何地方。像fname，lname，email，gender

我该怎么做？请帮我

如果我只想限制姓和名的搜索，该怎么做？

Answer 1

您可以将一个值保持filter在组件状态，并使用该值查看它是否作为子字符串包含在任何数组元素属性中。

例

class App extends React.Component {
  state = {
    filter: "",
    data: [
      {
        fname: "Jayne",
        lname: "Washington",
        email: "jaynewashington@exposa.com",
        gender: "female"
      },
      {
        fname: "Peterson",
        lname: "Dalton",
        email: "petersondalton@exposa.com",
        gender: "male"
      },
      {
        fname: "Velazquez",
        lname: "Calderon",
        email: "velazquezcalderon@exposa.com",
        gender: "male"
      },
      {
        fname: "Norman",
        lname: "Reed",
        email: "normanreed@exposa.com",
        gender: "male"
      }
    ]
  };

  handleChange = event => {
    this.setState({ filter: event.target.value });
  };

  render() {
    const { filter, data } = this.state;
    const lowercasedFilter = filter.toLowerCase();
    const filteredData = data.filter(item => {
      return Object.keys(item).some(key =>
        item[key].toLowerCase().includes(lowercasedFilter)
      );
    });

    return (
      <div>
        <input value={filter} onChange={this.handleChange} />
        {filteredData.map(item => (
          <div key={item.email}>
            <div>
              {item.fname} {item.lname} - {item.gender} - {item.email}
            </div>
          </div>
        ))}
      </div>
    );
  }
}

ReactDOM.render(<App />, document.getElementById("root"));

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>

<div id="root"></div>