I have a few requirements defined in the Requirement Diagram as shown in the below picture. I want to fetch the Rationale and Problem that are attached to the Requirement through API.
The DB has no relationship between the Requirement and Note in the t_object table. Do I have to look up in some other table? Please suggest.
EA.Elements(t_object) are connected with each other using EA.Connector (t_connector)
So in order to get from your requirement to your note, you can do something like this
foreach (EA.Connector connector in myRequirement.Connectors)
{
EA.Element otherElement;
if (connector.ClientID != myRequirement.ElementID)
{
otherElement = myRepository.GetElementByID(connector.ClientID)
}
else
{
otherElement = myRepository.GetElementByID(connector.ClientID)
}
if (otherElement.Type == "Note")
{
return otherElement;
}
}
In a query you can something like this
select note.*
from t_object o
inner join t_connector c on o.Object_ID in (c.Start_Object_ID, c.End_Object_ID)
inner join t_object note on note.Object_ID in (c.Start_Object_ID, c.End_Object_ID)
and note.Object_Type = 'Note'
where o.ea_guid = '<myRequirementGUID>'
Related
I use Entity Framework-6.
I have this code(outter join, LINQ to entity):
var inspectionSitesConjection = (from st in sites
join ir in inspectionReview on st.Id equals ir.SiteId into g
from subsite in g.DefaultIfEmpty()
select new GeneralReportViewModel
{
siteName = subsite.Site.Name,
address = subsite.Site.Description,
inspectionDate = subsite.DateReview,
siteType = subsite.Site.SiteType.Description,
frequency = subsite.InspectionFrequency.Name,
status = subsite.IsNormal,
}).AsNoTracking();
I need to make group by siteName and frequency.
Is it pussable to make group by inside LINQ above?
Here is a starting point:
var grouped = inspectionSitesConjection
.GroupBy(item => new { item.siteName, item.frequency });
But note that the result (as you may see in Queryable.GroupBy documentation) is no more IQueryable<GeneralReportViewModel> but IQueryable<IGrouping<Key, GeneralReportViewModel>> where Key is anonymous type having siteName and frequency properties.
I'm providing this just because you specifically asked. It's not quite clear what are you trying to achieve with that query. Also, once you decided to use explicit join, then use the joined table instead of navigation property, and take into account that subsite can be null due to outer join.
from st in sites
join ir in inspectionReview on st.Id equals ir.SiteId into g
from subsite in g.DefaultIfEmpty()
select new GeneralReportViewModel
{
siteName = st.Name,
address = st.Description,
siteType = st.SiteType.Description,
inspectionDate = subsite.DateReview, // problem if subsite == null
frequency = subsite.InspectionFrequency.Name, // problem if subsite == null
status = subsite.IsNormal, // problem if subsite == null
})
i want get all table names where created person is not "-AOS-" (Dynamics AX). In this code i get only who created first line in table:
for (tablecounter=1; tablecounter<=dict.tableCnt(); tablecounter++)
{
tableId = dict.tableCnt2Id(tablecounter);
common = new DictTable(tableId).makeRecord();
select common where common.createdBy !="";
if(common)
{
info(strFmt('%1---%2',common.createdBy,dict.tableName(common.TableId)));
}
}
You can try with scan over SysModelElement and SysModelElementData tables.
SysModelElement me;
SysModelElementData med;
while select firstOnly10 me
where me.ElementType == UtilElementType::Table
exists join med
where med.ModelElement == me.RecId
&& med.createdBy != '-AOS-'
{
info(me.Name);
}
You could also use the project filter (probably not as fast as a direct SQL query, but depending on your requirements more actionable).
I am in the process of converting an application that uses LINQ to SQL over to LINQ to Entities. I use a repository pattern and I have run in a problem that works in LINQ to SQL but not Entities.
In my data layer, I use LINQ statements to fill my object graph so that none of my database entities are exposed anywhere else. In this example, I have a Lookup Respository that returns a list of Categories. It looks like this:
public IQueryable<Entities.DomainModels.Category> getCategories()
{
return (from c in Categories
where !c.inactive
orderby c.categoryName
select new Entities.DomainModels.Category
{
id = c.categoryID,
category = c.categoryName,
inactive = c.inactive
});
}
Later, I want to put the categories into a sub query and it looks like this:
var d = from p in Programs
let categories = (from pc in p.Categories
join c in getCategories() on pc.categoryID equals c.id
select c)
select new
{
id = p.id,
title = p.title
categories = categories.ToList()
};
When I run this, I get the following error:
LINQ to Entities does not recognize the method 'System.Linq.IQueryable`1[Entities.DomainModels.Category] getCategories()' method, and this method cannot be translated into a store expression.
For reference, the following works though it doesn't return the data I need (it's basically a join):
var q = from p in Programs
from pc in p.Categories
join c in getCategories() on pc.categoryID equals c.id
select new
{
id = p.id,
category = c
};
I understand what the error means in concept however LINQ to SQL would make it work. I have this pattern throughout my data layer and I really want to keep it. Should this be working? If not, how can I modify it without mixing my layers.
You cant pass getCategories() to EF.
The query must be destructible to expression tree.
Calculate getCategories() first.
eg
var simpleList = getCategories().Select(id).Tolist;
then use a contains
where(t=> simpleList.Contains(t.CatId) // or the query syntax equivalent
I try to create a join query in Linq. I want to join a table more than one field with same
table. Please see my code below.
var roles = (from ords in _orderRepository.Table
join customers in _customerRepository.Table on ords.CustomerId equals customers.Id
join ordprvrnts in _orderProductVariantRepository.Table on ords.Id equals ordprvrnts.OrderId
join prdvrnts in _productVariantRepository .Table on ordprvrnts.ProductVariantId equals prdvrnts.Id
**join cstevntrle in _customerEventRoleRepository.Table on
new{ customers.Id equals cstevntrle.CustomerId } &&
new { cstevntrle.EventId == model.Event}**
orderby customers.Email ascending
select new CustomerEventRolesModel
{
Customer = customers.Email,
CUstomerId =customers.Id
});
I try to filter customerEventRoleRepository.Table with CustomerId and EventId
how can i do this in this join query.
Please Help.
you have boolean comparisons in your anonymous type definitions...
change your on clause to the following:
join cstevntrle in _customerEventRoleRepository.Table on
new { CustomerId = customers.Id, EventId = model.Event.EventId } equals
new { CustomerId = cstevntrle.CustomerId, EventId = cstevntrle.EventId }
I don't see "model" defined anywhere, so I'm not sure this is going to work, but it should be enough to demonstrate how joins based on multiple fields works - each anonymous class contains the fields from one "side" of the join.
I'm trying to write a query for a database that will left join a table to a look up table and the results will be returned based on a case statement.
In normal SQL the query would look like this:
SELECT chis_id, chis_detail, cilt.mhcatID, cilt.mhtID, 'TheFileName' =
CASE
WHEN cilt.mhcatID IS NOT NULL AND cilt.mhtID IS NOT NULL THEN chis_linked_filename
END
FROM chis
LEFT JOIN cilt on cilt.mhcatID = chis.mhcat_id AND cilt.mhtID = chis.mht_id
WHERE cch_id = 50
chis is the table being queried, cilt is a look-up table and does not contain any foreign key relationships to chis as a result (chis has existing FK's to mht and mhcat tables by the mhtID and mhcatID respectively).
The query will be used to return a list of history updates for a record. If the join to the cilt lookup table is successful this means that the caller of the query will have permission to view the filename of any associated files for the history updates.
Whilst during my research I've found various posts on here relating on how to do case statements and left joins in Linq to Entity queries, I've not been able to work out how to join on two different fields. Is this possible?
You need to join on an anonymous type with matching field names like so:
var query = from x in context.Table1
join y in context.Table2
on new { x.Field1, x.Field2 } equals new { y.Field1, y.Field2 }
select {...};
A full working example using the an extra from instead of a join would look something like this:
var query = from chis in context.Chis
from clit in context.Clit
.Where(x => x.mhcatID = chis.mhcat_id)
.Where(x => x.mhtID = chis.mht_id)
.DefaultIfEmpty()
select new
{
chis.id,
chis.detail,
cilt.mhcatID,
cilt.mhtID,
TheFileName = (cilt.mhcatID != null && cilt.mhtID != null) ? chis.linked_filename : null
};
Based on what Aducci suggested, I used a group join and DefaultIsEmpty() to get the results I wanted. For some reason, I couldn't get DefaultIfEmpty() didn't work correctly on its own and the resulting SQL employed an inner join instead of a left.
Here's the final code I used to get the left join working:
var query = (from chis in context.chis
join cilt in context.cilts on new { MHT = chis.mht_id, MHTCAT = chis.mhcat_id } equals new { MHT = cilt.mhtID, MHTCAT = cilt.mhcatID } into tempCilts
from tempCilt in tempCilts.DefaultIfEmpty()
where chis.cch_id == 50
select new {
chisID = chis.chis_id,
detail = chis.chis_detail,
filename = chis.chis_linked_filename,
TheFileName = (tempCilt.mhcatID != null && tempCilt.mhtID != null ? chis.chis_linked_filename : null),
mhtID = chis.mht_id,
mhtcatID = chis.mhcat_id
}).ToList();