javascript – 分页和过滤分别运行/ Vue
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内容图文
我抓取并对数据进行分页,没问题.但是当我尝试过滤数据时,分页不适用于过滤后的数据.仍在底部显示下一页.当我去(例如)第2页时,第二页没有数据.因为我已经过滤了它.我该如何解决这个问题？谢谢！
索引组件
Data(){
meta_data: {
last_page: null,
current_page: 1,
prev_page_url: null
}
},
methods: {
fetchEstates(page = 1){
axios.get('/ajax', {
params: {
page
}}).then((response) => {
// console.log(response);
this.estates = response.data.data;
this.insertMarkers();
this.meta_data.last_page = response.data.last_page;
this.meta_data.current_page = response.data.current_page;
this.meta_data.prev_page_url = response.data.prev_page_url;
});
},
},
computed: {
one: function () {
let filteredStates = this.estates.filter((estate) => {
return (this.keyword.length === 0 || estate.address.includes(this.keyword)) &&
(this.rooms.length === 0 || this.rooms.includes(estate.rooms)) &&
(this.regions.length === 0 || this.regions.includes(estate.region))});
if(this.sortType == 'price') {
filteredStates = filteredStates.sort((prev, curr) => prev.price - curr.price);
}
if(this.sortType == 'created_at') {
filteredStates = filteredStates.sort((prev, curr) => Date.parse(curr.created_at) - Date.parse(prev.created_at));
}
filteredStates = filteredStates.filter((estate) => { return estate.price <= this.slider.value});
filteredStates = filteredStates.filter((estate) => { return estate.extend <= this.sliderX.value});
filteredStates = filteredStates.filter((estate) => { return estate.m2_price <= this.sliderT.value});
return filteredStates;
},
}<pagination
:meta_data="meta_data"
v-on:next="fetchEstates">
</pagination>分页组件
props: ['meta_data'],
methods: {
next(page) {
this.$emit('next', page);
}
}
} <nav>
<ul class="pagination pagination-lg">
<li class="page-item"
:class="{ 'disabled': meta_data.prev_page_url === null }">
<a href="#"
class="page-link"
@click="next(meta_data.current_page-1)">
«
</a>
</li>
<li class="page-item"
v-for="page in meta_data.last_page"
:key="page"
:class="{ 'active':meta_data.current_page === page }">
<a href="#"
@click.prevent="next(page)"
class="page-link">
{{ page }}
</a>
</li>
<li class="page-item"
:class="{ 'disabled': meta_data.current_page === meta_data.last_page }">
<a href="#"
class="page-link"
@click="next(meta_data.current_page+1)">
»
</a>
</li>
</ul>
</nav>解决方法:
你做错了你应该将数据发送到后端/ sql然后在那里过滤它们.
所以你得到了正确的last_page等
无论如何,如果您仍想按原样过滤它们,您将需要计算页面agen.
这是一个示例,因此您可以计算filteredStates中的页数并生成页面,您可能已经能够生成它们,但计算可以帮助您.
Data(){
// you should use data only :) eg data:function() { return meta_data }
// but if this work for you i gusse its fine.
meta_data: {
totalPages: null,
current_page: 1,
pageSize: 20,// how many items exist per page
pagedItems: [], // paged items eg when you click prev or next
filteredData:[], // total items
prevClass: "",
nextClass: "",
pages:[]
}
},
methods: {
// this will init the paginations and display the data
getData: function(){
// totalpages
this.meta_data.totalPages = Math.ceil(this.meta_data.filteredData.length / this.meta_data.pageSize);
// items for the current selected Page
this.meta_data.pagedItems =
this.meta_data.filteredData.slice(this.meta_data.pageSize * (this.meta_data.current_page -1),this.meta_data.pageSize);
if (this.meta_data.current_page == this.meta_data.totalPages
|| this.meta_data.totalPages <=1)
this.meta_data.nextClass = "disabled";
else this.meta_data.nextClass = "";
if (this.meta_data.current_page <=1)
this.meta_data.prevClass = "disabled";
else this.meta_data.prevClass = "";
this.calPages();
},
toPage:function(page){
this.meta_data.current_page = page;
this.getData();
},
next: function(){
if (this.meta_data.totalPages >= this.meta_data.current_page +1){
this.meta_data.current_page++;
this.getData();
}
return false;
},
prev: function(){
if (this.meta_data.current_page -1 >=1 ){
this.meta_data.current_page--;
this.getData();
}
return false;
},
// this will generate [counter] pages each time you select a page.
// I wrote this a long time ago for one of my application
calPages: function(){
if (this.meta_data.totalPages<=0)
return false;
var start = this.meta_data.current_page;
var end = this.meta_data.current_page;
var counter = 3;
//If the page cannot be devised by counter enter the loop
if ((start % counter != 0) && (end % counter != 0)) {
//Get the next nearest page that is divisible by 5
while ((end % counter) != 0) {
end++;
}
//Get the previous nearest page that is divisible by counter
while ((start % counter) != 0) {
start--;
}
}
//The page is divisible by counter so get the next counter pages in the pagination
else {
end += counter;
}
//We are on the first page
if (start == 0) {
start++;
end++;
}
//We are on the last page
if (end == this.meta_data.totalPages || end > this.meta_data.totalPages) {
end = this.meta_data.totalPages ;
}
if (start == this.meta_data.current_page && start > 1)
start--;
while (end - start < counter && end - start > 0)
start--;
if (start <= 0)
start = 1;
while (end - start > counter)
end--;
var r =[];
for (var i = start; i <= end; i++)
r.push({ page:i, selected:(this.meta_data.current_page == i? "selected" : "") });
this.meta_data.pages = r;
}
fetchEstates(page = 1){
axios.get('/ajax', {
params: {
page
}}).then((response) => {
// console.log(response);
this.estates = response.data.data;
this.insertMarkers();
//this.meta_data.last_page = response.data.last_page;
//this.meta_data.current_page = response.data.current_page;
//this.meta_data.prev_page_url = response.data.prev_page_url;
});
},
},
computed: {
// dont see where you are calling this?
one: function () {
let filteredStates = this.estates.filter((estate) => {
return (this.keyword.length === 0 || estate.address.includes(this.keyword)) &&
(this.rooms.length === 0 || this.rooms.includes(estate.rooms)) &&
(this.regions.length === 0 || this.regions.includes(estate.region))});
if(this.sortType == 'price') {
filteredStates = filteredStates.sort((prev, curr) => prev.price - curr.price);
}
if(this.sortType == 'created_at') {
filteredStates = filteredStates.sort((prev, curr) => Date.parse(curr.created_at) - Date.parse(prev.created_at));
}
filteredStates = filteredStates.filter((estate) => { return estate.price <= this.slider.value});
filteredStates = filteredStates.filter((estate) => { return estate.extend <= this.sliderX.value});
filteredStates = filteredStates.filter((estate) => { return estate.m2_price <= this.sliderT.value});
this.meta_data.filteredData = filteredStates;
this. getData()// this will init the paginations and display the data
return filteredStates;
},
} <nav>
<ul class="pagination pagination-lg">
<li class="page-item"
:class="meta_data.prevClass">
<a href="#"
class="page-link"
v-on:click="prev">
«
</a>
</li>
<li class="page-item"
v-for="page in meta_data.pages" :key="page"
:class="page.selected">
<a href="#"
v-on:click="toPage(page.page)"
class="page-link">
{{ page.page }}
</a>
</li>
<li class="page-item" :class="meta_data.prevClass" v-on:click="next" >
<a href="#"
class="page-link"
@click="next">
»
</a>
</li>
</ul>
</nav>内容总结
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