I have one sharepoint list which is using Lookup Field, whose source is pointing to other list in the same site (Master data). While using OData query i don't see that column in my result.
If I use OData url with "FieldValuesAsText" I can see data. Also, I have tried using ContentType Expand and filter but i have no luck in finding.
Since, my list is very big and want to retrieve data in minimum number of calls. looking for some kind of approach or URL which will help me achieve the same
Try to expand look up field to get real value like this:
/_api/web/lists(guid'')/items?$select=Title,LookupFieldName1/FieldToBeExpanded1,LookupField2/FieldToBeExpanded2&$expand=LookupFieldName1,LookupFieldName2
In this endpoint, FieldToBeExpand1 should be the same as the column where lookup get from:
I am trying to pull a small group of feed/post objects from Facebook Graph API from an array of post ids.
string[] postids = {1234,1235,1236}
Could someone kindly show me the query string that request the posts?
I've tried using (but I know it's not correct)
https://graph.facebook.com/me/feed?ids=1234,1235,1236
No luck
I figured it out. I was pulling from the feed end point in one query and the ids were different based on the query.
You need to include the api version number in your Get request. For example, your URL should look like this:
https://graph.facebook.com/v2.8/?ids=1234,1235,1236
I have a facebook Graph API call to get a facebook users feed:
dynamic myFeed = await fb.GetTaskAsync(
("me/feed?fields=id,from {{id, name, picture{{url}} }},story,picture,link,name,description," +
"message,type,created_time,likes,comments")
.GraphAPICall(appsecret_proof));
The above returns a number of the latest user posts in a while say 21 or maybe 22 posts but not the complete list of user posts.
I searched for a way to iterate through a users feed using facebook pagination and I ended up finding this solution which works with facebook Offset pagination.
dynamic myFeed = await fb.GetTaskAsync(
("me/feed?fields=id,from {{id, name, picture{{url}} }},story,picture,link,name,description," +
"message,type,created_time,likes,comments")
.GraphAPICall(appsecret_proof), new {limit = "1000", offset = "21" });
This has taken me a step nearer to what I want to achieve but I think this is not the ideal way to do it and also it does not return all of users posts.
Is there any workaround? Please help.
P.S: I am using Facebook C# SDK.
UPDATE1:
As per Jeremy's answer. It seems that the facebook cursor pagination is the only right option for my requirements. I would like to know if C# facebook sdk provides any feature to iterate over the Next Edges so I can get all feed posts in one call, Is there any possible solution to this?
P.S: I've been through facebook API docs many times and I know what exactly the Nodes, Edges and Fields are, the only unfortunate thing is that facebook doesn't support C# SDK as yet and I was unable to find a proper documentation on Facebook C# SDK too.
First up a bit of terminology:
nodes - basically "things" such as a User, a Photo, a Page, a Comment
edges - the connections between "things", such as a Page's Photos, or a Photo's Comments
fields - info about those "things", such as a person's birthday, or the name of a Page
When you make an API request to a node or edge, you usually don't receive all of the results of that request in a single response. This is because some responses could contain thousands of objects so most responses are paginated by default.
To get all posts by a user you have 3 options:
Cursor-based Pagination
Cursor-based pagination is the most efficient method of paging and should always be used where possible. A cursor refers to a random string of characters which marks a specific item in a list of data. Unless this item is deleted, the cursor will always point to the same part of the list, but will be invalidated if an item is removed. Therefore, your app shouldn't store any older cursors or assume that they will still be valid.
When reading an edge that supports cursor pagination, you will see the following JSON response:
{
"data": [
... Endpoint data is here
],
"paging": {
"cursors": {
"after": "MTAxNTExOTQ1MjAwNzI5NDE=",
"before": "NDMyNzQyODI3OTQw"
},
"previous": "https://graph.facebook.com/me/albums?limit=25&before=NDMyNzQyODI3OTQw"
"next": "https://graph.facebook.com/me/albums?limit=25&after=MTAxNTExOTQ1MjAwNzI5NDE="
}
}
To get all posts by a user you keep surfing the "next" edges (upserting new items). This is how I do it when I dump entire groups into RDBMS's for statistical analysis. Often you will see edges with nodes you have already encountered, that's why I mention to UPSERT (update if it exists otherwise insert).
Time-based Pagination
Time pagination is used to navigate through results data using Unix timestamps which point to specific times in a list of data.
When using an endpoint that uses time-based pagination, you will see the following JSON response:
{
"data": [
... Endpoint data is here
],
"paging": {
"previous": "https://graph.facebook.com/me/feed?limit=25&since=1364849754",
"next": "https://graph.facebook.com/me/feed?limit=25&until=1364587774"
}
}
To get all a users posts you keep iterating back in time. This method will get you the posts in order, although may want them returned in an order by FaceBooks edge algorithm.
Offset-based Pagination
Offset pagination can be used when you do not care about chronology and just want a specific number of objects returned. This should only be used if the edge does not support cursor or time-based pagination.
So what you have found with Offset is the closest you will get to the stock-standard pagination you desire. However:
Offset based pagination is not supported for all API calls. To get consistent results, we recommend you to paginate using the previous/next links we return in the response.
You can read all this in the FB API docs.
https://developers.facebook.com/docs/graph-api/overview/
https://developers.facebook.com/docs/graph-api/using-graph-api/
Finally after doing some researches and reading some blogs I found out that there is no direct API CAlls from facebook to fetch all user feeder posts in once.
To achieve that functionality either one has to go for infinite scrolling as suggested by Jeremy Thomson or to iterate through different facebook data pages regardless of which facebook pagination type is supported by the edge. As far as I want a process without user interference/actions I would definitely go the second option which is iterating through facebook data pages with a while loop.
To do That we first need our two most important parameters (facebook access_token + (facebook appsecret_proof) as described below:
var appsecret_proof = access_token.GenerateAppSecretProof();
var fb = new FacebookClient(access_token);
Point to be remembered:
facebook access_token is generated by HttpContext class.
The facebook API call will get the users first 25 feeder post as below:
dynamic myFeed = await fb.GetTaskAsync(
("me/feed?fields=id,from {{id, name, picture{{url}} }},story,picture,link,name,description," +
"message,type,created_time,likes,comments")
.GraphAPICall(appsecret_proof));
The API Call above return results in a Json array and that should be hydrated through the Model View properties as shown here:
var postList = new List<FacebookPostViewModel>();
foreach (dynamic post in myFeed.data)
{
postList.Add(DynamicExtension.ToStatic<FacebookPostViewModel>(post));
}
Until here everything was clear before, the most important part which is surely fetching all facebook user post is now in action. For that we need to set a string NextPageUri to empty as here:
string NextPageURI = string.Empty;
The final part of all is to check if there is another page for the data, If yes should iterate and add the data to the View Model until there is no page lift as shown here:
while (myFeed.paging != null && myFeed.paging.next != null)
{
NextPageURI = myFeed.paging.next;
var nextURL = GetNextPageQuery(NextPageURI, access_token);
dynamic nextPagedResult = await fb.GetTaskAsync(nextURL.GraphAPICall(appsecret_proof));
foreach (dynamic post in nextPagedResult.data)
{
postList.Add(DynamicExtension.ToStatic<FacebookPostViewModel>(post));
}
}
This helped me to get rid of the problem faced. But yet I have another task in hand to work on. It is the speed of fetching the posts that if posts are morethan 30k would take 10 minutes which is not ideal at least for me.
My aim is to get all records from a table in ServiceNow. By default, I am able to get 250 records. But I need to get all the records. I learnt from here that
we can set the limit in the soap request url.
Code:
var url = "https://*****.service-now.com/rm_story.do?SOAP";
Additional code in getting records for reference
I added the limit parameter to the above url as
https://*****.service-now.com/rm_story.do?&limit=300&SOAP.
Even though, I am getting same 250 records.
Is this the correct way to add limit ? If not, how to add limit in the SOAP request url in ServiceNow? Thanks.
The _limit parameter must be passed in the body of the http request not the url. See answer to
ServiceNow - Getting all records for example http request to ServiceNow SOAP API using _limit parameter.
No, you need to look at first_row (perhaps combined with limit):
first_row: Instruct the results to be offset by this number of records from the beginning of the set. When used with __last_row has
the effect of querying for a window of results. The results are
inclusive of the first row number.
A want get all information which are in located in <forecast_conditions></forecast_conditions> tag for first ta I use
var for_cod = from currentCond in xdoc.Root.Descendants("current_conditions")
select currentCond;
I don;t know how to get information from 2,3 <forecast_conditions></forecast_conditions> tags because it have same names, maybe you have any ideas?
xml file: http://www.google.com/ig/api?weather=vilnius&hleng=eng
I am not sure what you exactly need. If you want to get all forecast_conditions for in a result set you can use this simple query
var query = from t in doc.Descendants("forecast_conditions")
select t;
You may wanna see Weather Information from Google Weather using ASP.NET and LINQ to XML, also check out this article Using Google Weather API In A C# Application. Its not using LINQ though. Also check out this thread C# Pull XML data from google's weather API