I am trying to figure out how Dynamic Websites on Parse work.
I have followed the instructions here: https://parse.com/docs/hosting_guide#webapp to set up a basic example.
Beside cloud/views/hello.ejs, I have made cloud/views/mything.ejs and used that from app.js and it all works.
Now I would like to show for example the number of records in MyClass on Parse.
In other words, inside my Dynamic Website I want to display information related to the contents of the DB on Parse.
How can I do that? Obviously I need to include some DB query at some point, but is there any sample?
Here's an example snippet
This handles a GET request to /mypage, on execution it creates a Parse Query but returns a result count instead of a record set matching the query. On completion of the query we then set a count or error on the response using res.set(). You can then use ejs to display the count or error.
app.get('/mypage', function(req, res) {
var query = new Parse.Query('My Class');
query.equalTo("name", "Joe Blogs");
query.count({
success: function(count) {
res.set('count', count);
},
error: function(error) {
res.set('error', error);
}
});
});
Related
I have a question regarding a small issue that I'm having. I've created a widget that will live on the Service Portal to allow an admin to Accept or Reject requests.
The data for the widget is pulling from the Approvals (approval_approver) table. Under my GlideRecord, I have a query that checks for the state as requested. (Ex. addQuery('state', 'requested'))
To narrow down the search, I tried entering addQuery('sys_id', current.sys_id). When I use this query, my script breaks and I get an error on the Service Portal end.
Here's a sample of the GlideRecord script I've written to Accept.
[//Accept Request
if(input && input.action=="acceptApproval") {
var inRec1 = new GlideRecord('sysapproval_approver');
inRec1.addQuery('state', 'requested');
//inRec1.get('sys_id', current.sys_id);
inRec1.query();
if(inRec1.next()) {
inRec1.setValue('state', 'Approved');
inRec1.setValue('approver', gs.getUserID());
gs.addInfoMessage("Accept Approval Processed");
inRec1.update();
}
}][1]
I've research the web, tried using $sp.getParameter() as a work-around and no change.
I would really appreciate any help or insight on what I can do different to get script to work and filter the right records.
If I understand your question correctly, you are asking how to get the sysId of the sysapproval_approver record from the client-side in a widget.
Unless you have defined current elsewhere in your server script, current is undefined. Secondly, $sp.getParameter() is used to retrieve URL parameters. So unless you've included the sysId as a URL parameter, that will not get you what you are looking for.
One pattern that I've used is to pass an object to the client after the initial query that gets the list of requests.
When you're ready to send input to the server from the client, you can add relevant information to the input object. See the simplified example below. For the sake of brevity, the code below does not include error handling.
// Client-side function
approveRequest = function(sysId) {
$scope.server.get({
action: "requestApproval",
sysId: sysId
})
.then(function(response) {
console.log("Request approved");
});
};
// Server-side
var requestGr = new GlideRecord();
requestGr.addQuery("SOME_QUERY");
requestGr.query(); // Retrieve initial list of requests to display in the template
data.requests = []; // Add array of requests to data object to be passed to the client via the controller
while(requestsGr.next()) {
data.requests.push({
"number": requestsGr.getValue("number");
"state" : requestsGr.getValue("state");
"sysId" : requestsGr.getValue("sys_id");
});
}
if(input && input.action=="acceptApproval") {
var sysapprovalGr = new GlideRecord('sysapproval_approver');
if(sysapprovalGr.get(input.sysId)) {
sysapprovalGr.setValue('state', 'Approved');
sysapprovalGr.setValue('approver', gs.getUserID());
sysapprovalGr.update();
gs.addInfoMessage("Accept Approval Processed");
}
...
I am querying a dynamodb table and i am getting the results required, however i cant seem to figure out how to pass the results for use.
I haven't included the params array but its standard. This code lives inside of a lambda.
What im trying to achieve is to make this update the "value" parameter with the contents of "item[0]['the_data'];
var value = "not changed after the dbase query, why?";
dynamodb.query(queryparams, function(err, data) {
if (err) {
console.log("Query Error", err);
} else {
if(data.Count > 0){
var item = data.Items;
value = item[0]['the_data'];
//console.log("The data: " + JSON.stringify(item));
}
}
});
Yes,
It’s shows in CloudWatch, and the log when I use the test functionality in the lambda itself.
The only way around it so far has been to create an s3 object, and creating another gateway and function to return that objects content.
I am trying to get a Reservation object which contains a pointer to Restaurant.
In Parse Cloud code, i am able to get the restaurants objects associated with Reservations via query.include('Restaurant') in log just before response.success. However, the Restaurants reverted back to pointer when i receive the response on client app.
I tried reverted JSSDK version to 1.4.2 & 1.6.7 as suggested in some answers, but it doesn't work for me.
Parse.Cloud.define('getreservationsforuser', function(request, response) {
var user = request.user
console.log(user)
var query = new Parse.Query('Reservations')
query.equalTo('User', user)
query.include('Restaurant')
query.find({
success : function(results) {
console.log(JSON.stringify(results))
response.success(results)
},
error : function (error) {
response.error(error)
}
})
})
response :
..."restaurant":{"__type":"Pointer",
"className":"Restaurants",
"objectId":"kIIYe7Z0tD"},...
You can't directly send the pointer objects back from cloud code even though you have included it. You need to manually copy the content of that pointer object to a javascript object. Like below:
var restaurant = {}
restaurant["id"] = YOUR_POINTER_OBJECT.id;
restaurant["createdAt"] = YOUR_POINTER_OBJECT.createdAt;
restaurant["custom_field"] = YOUR_POINTER_OBJECT.get("custom_field");
ps: in your code you seem do nothing else other than directly send the response back. I think parse REST api might be a better choice in that case.
It turned out that my code implementation was correct.
Parse.Cloud.afterSave(function(request) {
var type = request.object.get("type");
switch (type) {
case 'inspiration':
var query = new Parse.Query("Inspiration");
break;
case 'event':
var query = new Parse.Query("Event");
break;
case 'idea':
var query = new Parse.Query("Idea");
break;
case 'comment':
break;
default:
return;
}
if (query) {
query.equalTo("shares", request.object.id);
query.first({
success: function(result) {
result.increment("sharesCount");
result.save();
},
error: function(error) {
throw "Could not save share count: " + error.message;
}
});
}
});
For some reason request.object.id is not returning the object id from the newly created record. I've tested this code out throughly and have isolated it down to the request.object.id variable. I've even successfully ran it with using a pre-existing object ID and it worked fine. Am I using the wrong variable for the object ID?
Thanks in advanced for any help!
Had this exact problem a few weeks ago.
It turned out to be a bug in Parse's newest Javascript SDK. Please have a look at your CloudCode folder - it should contain a global.json file where you can specify the JavaScript SDK version. By default, it states "latest", change it to "1.4.2" and upload your CloudCode folder again.
In case the global.json file is missing in your cloud code folder, please have a look at this thread, where I described how to create it manually.
Thanks for the reply. I found out another work around for this for version 1.6.5. I should probably also mention that my use case for this code is to increment a count column (comments count) when a new relation has been added to a particular record (post).
Instead of implementing an afterSave method on my relation class (comment), I instead implemented a beforeSave method on my class (Post) and used request.object.dirtyKeys() to get my modified columns. From there I check to see if my dirty key was comments and if it is I increment my count column. It works pretty well actually.
In the function getweather() I do fetch some weather data from a Json-object and store that data in the variable data. Within that function, I can handle the Json-data, but how do I access the data from outside of getweather()?
It doesn't matter if i return the variable location or data. The variable place is just not Json.
How do I handle the place variable in order to make it work as it does within the function getweather()?
var ajax = require('ajax');
var place;
place = getweather();
function getweather()
{
// Make the request
ajax(
{
url: 'http://api.openweathermap.org/data/2.5/weather?q=paris.fr', type: 'json'
},
function(data)
{
// Success!
console.log("Successfully fetched weather data!");
// Extract data
var location = data.name;
return location;
},
function(error) {
// Failure!
console.log('Failed fetching weather data: ' + error);
}
);
}
The A in AJAX stands for asynchronous. What's happening in your code is that you are trying to assign a value to place before the asynchronous call to api.openweather.org has returned.
You can check this by placing a statement like console.log(place); directly after place = getweather();. You will notice in the console that None is returned before you see Successfully fetched weather data!
This issue has been described in detail in this post. It recommends restructuring your code around your callbacks.