I am trying to delete Posts from a comments section in my web app. Mongodb passes an objectId but I am unable to get it from my angular 2 front end. By default ObjectId is passed as _id so on my front end I call Post._id in my delete function and it passes through all this info
what I actually want is the unique ObjectId given by the database itself that look like this
How can I get this value on the front end of my application? I have all the code to my project on github located here with both my UI and API backend. Thanks for any help!
relative files from repo
UI/src/app/components - PostData.Service.ts
UI/src/app/components -postRand.component.ts
UI/src/app/components/models - Post.ts
API/src/controllers - PostAPIController.cs
API/src/models - Post.cs
API/src/models - DataAccess.cs
API Running
I believe I need to make this fix in the api layer because it is passing my _id as an object and not a string... This is just a guess of mine and I am not sure how to do this.
I found out how to solve my issue....
I had to go back into my model and convert my ObjectId to a string by parsing it out
[BsonRepresentation(BsonType.ObjectId)]
public string Id
{
get { return Convert.ToString(_id); }
set { _id = MongoDB.Bson.ObjectId.Parse(value); }
}
I then added my new Id field to all of my http calls changing out where I was calling by ObjectId, to now call upon my new string value Id
Now when I run my Api get the actual Id of my object
Lastly I added my newly generated Id field to my front end, replacing the old objectId value in my delete functions with the new Id.
All code has been updated in my git project, see file referenced in question for relevant documents.
After review it looks like you are trying to delete the object by an object id string instead of an object id object.
In PostAPIController.cs
line 74
objds.Remove(post._id);
This is looking for an object with a string value to match on.
Pretty sure it should be like this
objds.Remove(ObjectId.Parse(post._id))
This will construct a object id to match on for the deletion
Related
I am having lookup wherein salesforce query is there. I am using elements (item()) in subsequent activities. Till now i had item().name or item().email but now i have item().NVMStatsSF__Related_Lead__r.FirstName which has (dot) in the field name.
How should i parse it through body tag so that it reads it correctly?
So I have the following data in item()
{
"NVMStatsSF__Related_Lead__c": "00QE000egrtgrAK",
"NVMStatsSF__Agent__r.Name": "ABC",
"NVMStatsSF__Related_Lead__r.Email": "geggegg#gmail.com",
"NVMStatsSF__Related_Lead__r.FirstName": "ABC",
"NVMStatsSF__Related_Lead__r.OwnerId": "0025434535IIAW"
}
now when i use item().NVMStatsSF__Agent__r.Name it will not parse because of (dot) after NVMStatsSF__Agent__r. And it is giving me the following error.
'item().NVMStatsSF__Related_Lead__r.Email' cannot be evaluated because property 'NVMStatsSF__Related_Lead__r' doesn't exist, available properties are 'NVMStatsSF__Related_Lead__c, NVMStatsSF__Agent__r.Name, NVMStatsSF__Related_Lead__r.Email, NVMStatsSF__Related_Lead__r.FirstName, NVMStatsSF__Related_Lead__r.OwnerId'.",
"failureType": "UserError",
"target": "WebActivityToAddPerson"
this is because ADF uses '.' for object reading.
Could you find a way to rename the field name which contains '.'?
Seems like you need a built-in function to get the value of an object according to the key. Like getValue(item(), 'key.nestkey'). But unfortunately, seems there isn't such a function. You may need handle your key first.
Finally, it worked. I was being silly.
Instead of taking the value from the child table with the help of (dot) operator I just used subquery. Silly see.
And it worked.
Though I have the record with id 13163 (db.locations.find({_id: 13163})), it's giving me error:
Mongoid::Errors::DocumentNotFound in LocationsController#show
Problem: Document(s) not found for class Location with id(s) 13163.
Summary: When calling Location.find with an id or array of ids, each
parameter must match a document in the database or this error will be
raised. The search was for the id(s): 13163 ... (1 total) and the
following ids were not found: 13163. Resolution: Search for an id that
is in the database or set the Mongoid.raise_not_found_error
configuration option to false, which will cause a nil to be returned
instead of raising this error when searching for a single id, or only
the matched documents when searching for multiples.
# Use callbacks to share common setup or constraints between actions.
def set_location
#location = Location.find(params[:id])
end
locations_controller.rb:
class LocationsController < ApplicationController
before_action :set_location, only: [:show, :edit, :update, :destroy]
# GET /locations
# GET /locations.json
def index
#locations = Location.all
end
# GET /locations/1
# GET /locations/1.json
def show
end
private
# Use callbacks to share common setup or constraints between actions.
def set_location
#location = Location.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def location_params
params.require(:location).permit(:loc_name_en, :loc_name_jp, :channel)
end
end
Setting up the option raise_not_found_error: false is not the case as I do have a document in database.
SOLUTION:
Big thanks to #mu is too short for giving me a hint.
The problem can be solved in 2 ways:
Declare field :_id, type: Integer in the model location.rb
Or converting the passing parameter to Integer like Location.find(params[:id].to_i) in locations_controller.rb as shown below in the #mu is too short's answer
I'd guess that you have a type problem. You say that this:
db.locations.find({_id: 13163})
finds the document in the MongoDB shell. That means that you have a document in the locations collection whose _id is the number 13163. If you used the string '13163':
db.locations.find({_id: '13163'})
you won't find your document. The value in params[:id] is probably a string so you're saying:
Location.find('13163')
when you want to say:
Location.find(13163)
If the _id really is a number then you'll need to make sure you call find with a number:
Location.find(params[:id].to_i)
You're probably being confused because sometimes Mongoid will convert between Strings and Moped::BSON::ObjectIds (and sometimes it won't) so if your _id is the usual ObjectId you can say:
Model.find('5016cd8b30f1b95cb300004d')
and Mongoid will convert that string to an ObjectId for you. Mongoid won't convert a String to a number for you, you have to do that yourself.
I try in Grails service save an object to mongodb:
Cover saveCover = new Cover()
saveCover.id = url
saveCover.url = url
saveCover.name = name
saveCover.sku = sku
saveCover.price = price
saveCover.save()
Cover domain looks like this:
class Cover {
String id
String name
String url
String sku
String price
}
So I want to have custom id based on url, but during save process I get error:
Could not commit Datastore transaction; nested exception is
org.grails.datastore.mapping.core.OptimisticLockingException: The
instance was updated by another user while you were editing
But if I didn`t use setters and just pass all values in constructor, the exception is gone. Why?
As reported in the documentation here:
Note that if you manually assign an identifier, then you will need to use the insert method instead of the save method, otherwise GORM can't work out whether you are trying to achieve an insert or an update
so you need to use insert method instead of save when id generator is assigned
cover.insert(failOnError: true)
if you do not define the mapping like this:
static mapping = {
id generator: 'assigned'
}
and will use insert method you'll get an auto-generated objectId:
"_id" : "5496e904e4b03b155725ebdb"
This exception occurs when you assign an id to a new model and try to save it because GORM thinks it should be doing an update.
Why this exception occurs
When I ran into this issue I was using 1.3.0 of the grails-mongo plugin. That uses 1.1.9 of the grails datastore core code. I noticed that the exception gets generated on line 847(ish) of NativeEntryEntityPersister. This code updates an existing domain object in the db.
Above that on line 790 is where isUpdate is created which is used to see if it's an update or not. isInsert is false as it is only true when an insert is forced and readObjectIdentifier will return the id that has been assigned to the object so isUpdate will end up evaluating as true.
Fixing the exception
Thanks to && !isInsert on line 791 if you force an insert the insert code will get called and sure enough the exception will go away. However when I did this the assigned id wasn't saved and instead a generated object id was used. I saw that the fix for this was on line 803 where it checks to see if the generator is set to "assigned".
To fix that you can add the following mapping.
class Cover {
String id
String name
String url
String sku
String price
static mapping = {
id generator: 'assigned'
}
}
A side effect of this is that you will always need to assign an id for new Cover domain objects.
I am trying to find the max changestamp so I can start using it. I tried the following:
URL url = "https://docs.google.com/feeds/default/private/changes?v=3"
ChangelogFeed foo = service.getFeed(url, ChangelogFeed.class);
LargestChangestamp stamp = foo.getLargestChangestamp();
stamp is always null.
Is this the way to get the largest changestamp, or do I need to set it first in order to use it?
The largest changestamp is also available in the user metadata feed. See the "docs:largestChangestamp" element within the response protocol tab here,
I'm not sure the java api exposes the largestChangestamp property directly yet - last time I checked it was hidden in the xmlBlob property, and I had to do an xml parse to grab it out.
This seems to be a bug in the API. I got the changestamps by getting the ChangelogEntrys from the ChangelogFeed:
List<ChangelogEntry> entries = foo.getEntries();
for (ChangelogEntry entry: entries) {
String blob = entry.getXmlBlob().getBlob();
System.out.println("Blob: " + blob);
}
The changestamp for an entry is contained in its blob.
I have created a doctype in umbraco which has one of the following property:
Property - Case study link
Datatype - Content picker
I need to fetch the URL of this document in a Razor macro and assign it to a hyperlink.
Currently am doing it in this way but it's giving me an error:
#foreach (var item in #Model.OurWork){
Read case study
}
And here is the error I get on viewing the page:
Error loading Razor Script OurWorkGrid.cshtml The best overloaded
method match for 'umbraco.library.NiceUrl(int)' has some invalid
arguments
I have tried outputting the node id without using the niceURL() function and it works fine (outputs 1088).
Read case study
results in this:
Read case study
But as soon as I put back NiceURL() function, it chokes again.
I really don't know what am I doing wrong here!
Instead of using the umbraco library method, try loading the node with the ID first, and then using the Url property to get the nice URL.
#foreach (var item in #Model.OurWork){
var caseStudyNode = #Model.NodeById(item.caseStudyLink);
Read case study
}
Also, add some form of a check to make sure the value is set, in case it's not a mandatory property on the doc type. Here's one example:
if (#item.HasProperty("caseStudyLink") && !string.IsNullOrEmpty(#item.caseStudyLink))
{
...
}
Try something like:
#foreach (var item in #Model.OurWork){
Read case study
}
You may want to check first whether item.caseStudyLink contains a value because this will throw an error otherwise.