I'm implementing search with pagination in React. So far I found few examples of it, but all they use code with double setState()
, before and after AJAX call to backend. For example my current solution is:
import React from "react"
import PropTypes from "prop-types"
import SearchField from "components/SearchField"
import SearchResults from "components/SearchResults"
import Item from "models/Item"
class Search extends React.Component {
constructor() {
super()
this.state = {
query: "",
page: 1,
foundItems: []
}
this.handleSearch = this.handleSearch.bind(this)
this.handlePageChange = this.handlePageChange.bind(this)
}
updateSearchResults() {
const query = this.state.query
const params = {
page: this.state.page
}
Item.search(query, params).then((foundItems) => {
this.setState({ foundItems })
})
}
handleSearch(event) {
this.setState({
query: event.target.value
}, this.updateSearchResults)
}
handlePageChange(data) {
this.setState({
page: data.selected + 1
}, this.updateSearchResults)
}
render() {
return (
<div className="search">
<SearchField onSearch={this.handleSearch} />
<SearchResults
onPageChange={this.handlePageChange}
onSelect={this.props.onSelect}
items={this.state.foundItems}
/>
</div>
)
}
}
Search.propTypes = {
onSelect: PropTypes.func.isRequired
}
export default Search
I know that I can change interface of updateSearchResults
to receive query and page as arguments and then I can avoid first setState
to pass values there, but it doesn't look like a good solution, because when list of search parameters will grow (sorting order, page size, filters for example) then it'll get a bit clumsy. Plus I don't like idea of manual state pre-management in handleSearch
and handlePageChange
functions in this way. I'm looking for a better implementation.
I am not fully sure what you are asking, but you can optimise your code a bit by doing the following:
class Search extends React.Component {
constructor() {
super()
this.page = 1;
this.query = "";
this.state = {
foundItems: []
}
this.handlePageChange = this.handlePageChange.bind(this)
}
updateSearchResults(event) {
if(typeof event === "object")
this.query = event.target.value;
const params = {
page: this.page
}
Item.search(this.query, params).then((foundItems) => {
this.setState({ foundItems })
})
}
handlePageChange(data) {
this.page = data.selected + 1;
this.updateSearchResults();
}
render() {
return (
<div className="search">
<SearchField onSearch={this.updateSearchResults} />
<SearchResults
onPageChange={this.handlePageChange}
onSelect={this.props.onSelect}
items={this.state.foundItems}
/>
</div>
)
}
}
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