I'm a newbie when it comes to mongodb so I apologize if this question is simple but I couldn't find an answer anywhere. I have a DB with one collection called genre and each object has an ID and Name , I want to create new collection called Event which has id,Name,genreid. Is it possible to create a event object but instead of passing in the id of a genre to query the id based on the genre name ? I know in SQL it would be
Insert into event(id,name,genreID) values (01,test,(select Id from genre where genre.name ='rock'));
Is that possible in Mongo? Cheers in advance
Update:
To insert you need to first find the genre _id based on name and then use its _id to create event document.
Try this :
If you are using Mongo Shell, you can do this:
var genre = db.genres.findOne({name : "genre_name"});
db.events.insert({
name : "event_name",
genreid : genre._id
})
Read Mongodb Shell methods documentation for more info.
If you are using mongoose and nodejs, you can use this:
Genre.findOne({name : "genre_name"}).then(genre => {
var event = new Event();
event.genreid = genre._id;
event.name = "event_name";
return event.save();
}).then(event=>{
//event is the newly created event
});
Related
Working in VB.Net, using the Microsoft.Graph api communicate with sharepoint.
I have a list on a sharepoint site.
Lets say:
List name : ListTestName
Columns: ListColumnTest1, ListColumnTest2, ListColumnTest3
Dim queryFields As List(Of QueryOption) = New List(Of QueryOption) From {New QueryOption("$expand", "fields")}
Dim items As IListItemsCollectionPage = Await GraphClient.Sites(sharepointSessionId).Lists("ListTestName").Items.Request(queryFields).GetAsync()
This is the code I have to grab the list and trying to get all of the fields (columns) but when I look into the Fields in the "Items" variable I do not see any of the fields that I have added to the list. I only see the sharepoint fields such as "title" or "Id"
I really dont understand why this is not working.
Even when I look via the the graph-explorer site (https://developer.microsoft.com/en-us/graph/graph-explorer) using:
GET https://graph.microsoft.com/v1.0/sites/<SiteId's>/lists/ListTestName/items?expand=fields
I do not see my custom columns However if I try and filter directly to one of the columns like this :
GET https://graph.microsoft.com/v1.0/sites/<SiteId's>/lists/ListTestName/items?expand=fields(select=ListColumnTest1)
This does seem to have returned back my custom field.
Thus I tried adding to the query field {New QueryOption("$expand", "fields(select=ListColumnTest1")} this just crashed when I called the request.
Edit: I asked this question slightly wrong and will be posting a second question that is more to what I need. However, below the question is marked correct because their solution is the correct solution for what I asked. :)
Have you try this endpoint?
GET https://graph.microsoft.com/v1.0/sites/{site-id}/lists/{list-id}?expand=columns,items(expand=fields)
I could get the custom columns with this endpoint.
Updated:
IListColumnsCollectionPage columns = graphClient.Sites["b57886ef-vvvv-4d56-ad29-27266638ac3b,b62d1450-vvvv-vvvv-84a3-f6600fd6cc14"].Lists["538191ae-7802-43b5-90ec-c566b4c954b3"].Columns.Request().GetAsync().Result;
I would avoid to create QueryOption. Try to use Expand and Select method.
Example (C#...apologise I'm not familiar with VB but I hope it will easy for you to rewrite it):
await GraphClient.client.Sites[sharepointSessionId].Lists["ListTestName"].Items.Request()
.Expand(x => new
{
ListColumnTest1 = x.Fields.AdditionalData["ListColumnTest1"],
ListColumnTest2 = x.Fields.AdditionalData["ListColumnTest2"]
})
.Select(x => new
{
ListColumnTest1 = x.Fields.AdditionalData["ListColumnTest1"],
ListColumnTest2 = x.Fields.AdditionalData["ListColumnTest2"]
})
.GetAsync();
How do I find all the records in Redis?
USER_EXCHANGE = table
USER_ID = User ID (primary key)
UID = relationship
The key is stored with the following structure
USER_EXCHANGE:USER_ID:4030:UID:63867a4c6948e9405f4dd73bd9eaf8782b7a6667063dbd85014bd02046f6cc2e
I am trying to find all the records of the user 4030...
using (var redisClient = new RedisClient ())
{
List<object> ALL_UID = redisClient.Get<List<object>>("USER_EXCHANGE:USER_ID:4030:UID:*");
}
What am I doing wrong? Thank you all for your help.
Hi as you're trying to fetch all keys matching a pattern you should use KEYS.
GET won't match patterns. by will retrieve complete full names.
Caution this is a debug function and not a production function.
doc: https://redis.io/commands/keys
Production simple solution, recommanded for you is :
store a list of your key in a LIST
USER_EXCHANGE:USER_ID:4030 => [ uid1, uid2, uid3 ....]
get list of uids for a specific user ID by getting the list.
This is a good practice in REDIS.
I'm using early-bound entities, generated by CrmSvcUtil, and I'm testing the SDK by retrieving an account entity:-
var account = myContext.AccountSet.FirstOrDefault(o => o.Id == Guid.Parse("..."));
(BTW is there an easier way to retrieve an entity by ID?!)
Looking at the account object that is returned, I can see various properties of type OptionSetValue (e.g. "PreferredContactMethodCode"). How do I get the actual item from this OptionSetValue object?
Similarly, there are numerous properties of type EntityReference, which contains an Id and LogicalName (the entity name I presume). How can I populate such a property - is it one of the Get... methods? And do these have to be called separately, or is it possible to "pre-fetch" certain relationships as part of the initial query that retrieves the account entity?
Similarly with the various IEnumerable<> properties (which presumably correspond to 1-M entity relationships), e.g. a property called "opportunity_customer_accounts" of type IEnumerable. How do I populate one of these properties? And (again) does this have to be done as a separate query/method call, or can it be "pre-fetched"?
Retrieve
I'm not really sure how much simpler the retrieve operation could get but for a single record the user of the context is probably overkill. So you could retrieve a specific record where you know directly with the IOrganizationService:
account = service.Retrieve("account", Guid.Parse("..."), new ColumnSet(true));
Option Set Labels
For the OptionSet labels you can look at my answer here: How to get the option set from a field in an entity in CRM 2011 using crm sdk and C#.
If you need the label for multiple OptionSet's on an entity you may want to just retrieve the Entity's metadata once (http://srinivasrajulapudi.blogspot.com/2012/01/retrieve-entity-metadata-in-crm-2011.html):
string entityName ="contact";
// Get the metadata for the currently list's entity
// This metadata is used to create a "Property Descriptor Collection"
RetrieveEntityRequest mdRequest = new RetrieveEntityRequest ( )
{ EntityFilters = EntityFilters.All,
LogicalName = entityName,
RetrieveAsIfPublished = false
};
// Execute the request
RetrieveEntityResponse entityResponse = ( RetrieveEntityResponse ) this.ServiceProxy.Execute ( mdRequest );
EntityMetadata entityData = entityResponse.EntityMetadata;
//To Get Option Set Data
var preferdList= ( entityData.Attributes.Where ( p => p.LogicalName == "preferredcontactmethodcode" ) ).ToList ( ).FirstOrDefault ( ); ;
if ( preferdList != null ) {
PicklistAttributeMetadata optionList= preferdList as PicklistAttributeMetadata;
OptionSetMetadata opValues= optionList.OptionSet;
foreach ( var op in opValues.Options ) {
preferedMethod.Add ( new OptionSet { Value = op.Value.Value, Text = op.Label.LocalizedLabels[0].Label.ToString() } );
}
}
EntityReference()
To set an EntityReference typed field:
account.primarycontact = new EntityReference("contact", Guide.Parse("..."));
If they have a value and you requested the column in your ColumnSet() they should be populated, so I'm not really sure I understand your question. If you mean, you want the full record then you need to do a service.Retrieve(...) for the record.
Related Entities (i.e., opportunity_customer_accounts)
This is where using an OrganizationServiceContext makes life easier (https://msdn.microsoft.com/en-us/library/gg695791.aspx):
context.LoadProperty(contact, "transactioncurrency_contact");
// read related entity dynamically
var currency = contact.GetRelatedEntity("transactioncurrency_contact");
Console.WriteLine(currency.GetAttributeValue("currencyname"));
// read related entity statically
var currencyStatic = contact.transactioncurrency_contact;
Console.WriteLine(currencyStatic.CurrencyName);
If you are not using an OrganizationServiceContext you can try using a QueryExpression using LinkedEntities, although I've never done this to populate an early-bound entity so I don't know if it works (perhaps someone will add a comment with the answer.)
My Object has many transactions which belong to a type, whcich then belong to a group. I would like to pull all the transactions from my Object which are in a specific group, say blue.
Been trying to do this using both SQL and Activerecord and have failed in both endeavors.
I can get this procedure to print out the quality by which I then want to sort by:
object.transactions.map { |to| "#{to.transaction_type.transaction_group.name}" }
And here is a sample of what i have been running, but oviously dosen't work. Haven't managed to find a way to
id = Group.find_by_name("name")
object.transactions.where(transaction_type.group_id == id)
Can you do something like:
id = Group.find_by_name("name")
object.transactions.
joins(:type).
where("types.group_id" => id)
I am working on NET MVC 3.0 and Nhibernate 3.0. I want to fetch only one property from database to an object.
For instance, suppose I have a class Module. I want to select all the names from module table (like select modulename from module query) and an prepare a list of module objects which have only name. All other properties can be null.
I tried this using QueryOver API:
IQueryOver<ProjectModule> module = session.QueryOver<ProjectModule>()
.Select(a=>a.Name)
.TransformUsing(
NHibernate.Transform.Transformers.AliasToBean<ProjectModule>());
pm = module.List<ProjectModule>();
pm is IList<ProjectModule> type.
Transaction gets committed successfully. No error occurred, but I get a list of module objects with all properties = null. Module name null, module id null etc.
I checked what query is executing on SQL using NUnit and got this: SELECT this_Name as y0_ FROM ProjectModule this_.
To be more accurate create a DTO object, assume ProjectModuleDto, that will contain only the Name. It's not a good practice to use the the domain object with uninitialized values through your code, cause it creates confusions of filled data in various scenarious.
And the fllowing code will do the trick - populate the list of DTOs: ProjectModuleDto with correct Name of project module from database:
ProjectModuleDto projectModuleDto = null;
IQueryOver<ProjectModule> module = session.QueryOver<ProjectModule>()
.SelectList(
list=>list.Select(a => a.Name).WithAlias(() => projectModuleDto.Name)
)
TransformUsing(NHibernate.Transform.Transformers.AliasToBean<ProjectModuleDto>());
pm = module.List<ProjectModuleDto>();
If you are fetching only a single property, you don't need to use transformers. Try to use a List<string> directly:
var moduleNames = session.QueryOver<ProjectModule>()
.Select(a => a.Name)
.List<string>();
Read more about QueryOver syntax on NHibernate blog.
Is this what you're looking for?
List<ProjectModule> result = new List<ProjectModule>();
session.QueryOver<ProjectModule>()
.Select(a => a.Name)
.ToList().ForEach(delegate(string mName)
{
result.Add(ProjectModule() { Name = mName });
});