I'm using Angular version 5. I need to do Server Side for angular-datatables. It works with POST request but I'm unable to do it with GET request.
There's a sample API (https://angular-datatables-demo-server.herokuapp.com/), It gives same response for GET and POST request. Angular-datatables does server-side for POST but not GET.
Here's a code example (https://stackblitz.com/edit/visible-columns-with-serverside-loading-angular-way).
Finally got it working. I needed to send datatables info via request params. Here's what I did.
this.dtOptions = {
paging: true,
lengthChange: false,
searching: true,
pageLength: 10,
columnDefs: [{ targets: 3, orderable: false }],
pagingType: 'simple_numbers',
order: [[0, 'desc']],
serverSide: true,
processing: true,
ajax: (dataTablesParameters: any, callback) => {
const params = this.objectToHttpParams(dataTablesParameters);
console.log('params', params);
this.http
.get(
'http://myapi.com',
{
params: params,
headers: new HttpHeaders().set(
'token',
localStorage.getItem('token')
)
}
)
.subscribe(resp => {
this.result = resp['data'];
callback({
recordsTotal: resp['length'],
recordsFiltered: resp['length'],
data: []
});
});
}
};
// Helper Function
objectToHttpParams(obj: any) {
return Object.entries(obj || {}).reduce((params, [key, value]) => {
return params.set(
key,
isObjectLike(value) ? JSON.stringify(value) : String(value)
);
}, new HttpParams());
}
With these options, I'm able to make it work with GET requests and also send HTTP Params and Headers instead of sending in body.
This worked for me
ajax: (dataTablesParameters: any, callback) => {
const params = {};
this.objectToHttpParams(params , dataTablesParameters , '');
this.http
.get(
'http://myapi.com,
{
params: params,
headers: new HttpHeaders().set(
'token',
localStorage.getItem('token')
)
}
).subscribe(resp => {
this.result = resp['data'];
callback({
recordsTotal: resp['length'],
recordsFiltered: resp['length'],
data: []
});
});
},
objectToHttpParams(params: any, data: any, currentPath: string) {
Object.keys(data).forEach(key => {
if (data[key] instanceof Object) {
if (currentPath !== '' ) {
this.objectToHttpParams(params, data[key], `${currentPath}[${key}]`);
} else {
this.objectToHttpParams(params, data[key], `${currentPath}${key}`);
}
} else {
if (currentPath !== '' ) {
params[`${currentPath}[${key}]`] = data[key];
} else {
params[`${currentPath}${key}`] = data[key];
}
}
});
}
Verified and adjusting a couple of things, I was able to replicate the behavior of the native datatable parameters when the serverside parameter is present Credit