I have the below requirement to be implemented in a plugin code on an Entity say 'Entity A'-
Below is the data in 'Entity A'
Record 1 with field values
Price = 100
Quantity = 4
Record 2 with field values
Price = 200
Quantity = 2
I need to do 2 things
Add the values of the fields and update it in a new record
Store the Addition Formula in a different config entity
Example shown below -
Record 3
Price
Price Value = 300
Formula Value = 100 + 200
Quantity
Quantity Value = 6
Formula Value = 4 + 2
Entity A has a button named "Perform Addition" and once clicked this will trigger the plugin code.
Below is the code that i have tried -
AttributeList is the list of fields i need to perform sum on. All fields are decimal
Entity EntityA = new EntityA();
EntityA.Id = new Guid({"Guid String"});
var sourceEntityDataList = service.RetrieveMultiple(new FetchExpression(fetchXml)).Entities;
foreach (var value in AttributeList)
{
EntityA[value]= sourceEntityDataList.Sum(e => e.Contains(value) ? e.GetAttributeValue<Decimal>(value) : 0);
}
service.Update(EntityA);
I would like to know if there is a way through linq I can store the formula without looping?
and if not how can I achieve this?
Any help would be appreciated.
Here are some thoughts:
It's interesting that you're calculating values from multiple records and populating the result onto a sibling record rather than a parent record. This is different than a typical "rollup" calculation.
Dynamics uses the SQL sequential GUID generator to generate its ids. If you're generating GUIDs outside of Dynamics, you might want to look into leveraging the same logic.
Here's an example of how you might refactor your code with LINQ:
var target = new Entity("entitya", new Guid("guid"));
var entities = service.RetrieveMultiple(new FetchExpression(fetchXml)).Entities.ToList();
attributes.ForEach(a => target[a] = entities.Sum(e => e.GetAttributeValue<Decimal>(a));
service.Update(target);
The GetAttributeValue<Decimal>() method defaults to 0, so we can skip the Contains call.
As far as storing the formula on a config entities goes, if you're looking for the capability to store and use any formula, you'll need a full expression parser, along the lines of this calculator example.
Whether you'll be able to do the Reflection required in a sandboxed plugin is another question.
If, however, you have a few set formulas, you can code them all into the plugin and determine which to use at runtime based on the entities' properties and/or config data.
I have set of data where I want to apply filters by default to a numberDisplay. The data is something like this.
data = [{category:'A',value:10},
{category:'B',value:10},
{category:'C',value:10},
{category:'S',value:10},
{category:'C',value:10},
{category:'A',value:10}]
I am trying to create a number display which will show sum of values other than category 'S', I tried using fake groups but they are failing. What would be the best method to achieve this ?
You don’t need a fake group for this, since you’re not trying to change the shape/structure of the aggregation. Ordinary crossfilter reductions cover this purpose.
You can simply do
cf.groupAll().reduceSum(d => d.category === ‘S’ ? 0 : d.value);
This will sum the value of every row included in the current filters, but will substitute zero if the row’s category is S.
I have the following dimensions: Patients and Collection Type (Blood or Tissue). Measure: Collections.
I am counting how many blood and tissue collections for each patient have been made.
Here is my table: Collections per Patient by Collection Type
Now I want to filter this table: I want to display only those Patients who have more then 2 Blood Collections and more then 2 Tissue Collections.
So, I want to see only Patient B, D, and E.
How can I do this?
There are a variety of ways you could accomplish your desired result. Probably one of the easier ways would be to unpivot your data such that 'blood collections' and 'tissue collections' are separate columns instead of one. I don't believe Tableau natively supports this while importing a data source currently; however, you can created two additional calculated fields to replicate an unpivot.
Blood Field:
IF [Collection_Type] = 'Blood'
THEN [Collection]
ELSE Null
END
Tissue Field:
IF [Collection_Type] = 'Tissue'
THEN [Collection]
ELSE Null
END
EDIT: Create a Calculated field that contains your desired condition for filtering, Ex.:
(SUM([Blood_field]) > 2 AND SUM([Tissue Field]) > 2)
Calculated field will evaluate to TRUE or FLASE. Filter for records for TRUE on this field
I have a simple question about programming in Ruby. I'm a newbie to Ruby, so if somebody can help me, I will really appreciate it.
Assume a system lets users have buyer and seller feedback ratings. I want to add/merge the buy and sell feedback ratings for a user into one consolidated rating, so only the rating needs to be added from the two Relation objects. The user id is only used as the key, but is not added.
buy_rating = user_object.group(buy_feedback_rating).select('buy_feedback_rating, COUNT(id) as count')
sell_rating = user_object.group(sell_feedback_rating).select('sell_feedback_rating, COUNT(id) as count')
buy_rating and sell_rating are histograms of the user's buy/sell rating, with 1=Terrible, 2=Poor, 3=Average, 4=Good, 5=Very Good.
The following is a sample array with (key,value) pairs where key=rating from 1 to 5, and value=number of ratings
buy rating = [(1,2),(2,5),(3,1),(4,7),(5,6)]
sell rating = [(1,3),(2,2),(3,7),(4,4),(5,7)]
Desired output = [(1,5),(2,7),(3,8),(4,11),(5,13)]
(obtained by adding only the second values from each array, not the first values).
The buy_rating and sell_rating arrays will only have the the key->value pair if the value>0. Meaning, if a buyer has no buyer rating=1, then the pair (1,0) will not be present in the buy_rating array. This means the arrays could be as follows:
buy_rating = [[2,5],[3,1],[4,7]]
sell_rating = [[1,3],[2,2],[5,7]]
Question is, how do I achieve the desired result? I want to add only the second column, not the first, from each array. Object returned should be of the same data type as buy_rating and sell_rating, i.e. buy_rating and sell_rating are both ActiveRecord::Relation objects, and the result should also be an ActiveRecord::Relation object.
You can make a map of values, sum based on the first, index, and then convert back to an array
buy_rating = [[1,2],[2,5],[3,1],[4,7],[5,6]]
sell_rating = [[1,3],[2,2],[3,7],[4,4],[5,7]]
merged_ratings = buy_rating + sell_rating
composite_ratings = Hash.new(0)
merged_ratings.each do |rating|
composite_ratings[rating[0]]+=rating[1]
end
composite_ratings.to_a
Check this fiddle: http://rubyfiddle.com/riddles/2d0f9/2
I have a database table that holds parent and child records much like a Categories table. The ParentID field of this table holds the ID of that record's parent record...
My table columns are: SectionID, Title, Number, ParentID, Active
I only plan to allow my parent to child relationship go two levels deep. So I have a section and a sub section and that it.
I need to output this data into my MVC view page in an outline fashion like so...
Section 1
Sub-Section 1 of 1
Sub-Section 2 of 1
Sub-Section 3 of 1
Section 2
Sub-Section 1 of 2
Sub-Section 2 of 2
Sub-Section 3 of 2
Section 3
I am using Entity Framework 4.0 and MVC 2.0 and have never tried something like this with LINQ. I have a FK set up on the section table mapping the ParentID back to the SectionID hoping EF would create a complex "Section" type with the Sub-Sections as a property of type list of Sections but maybe I did not set things up correctly.
So I am guessing I can still get the end result using a LINQ query. Can someone point me to some sample code that could provide a solution or possibly a hint in the right direction?
Update:
I was able to straighten out my EDMX so that I can get the sub-sections for each section as a property of type list, but now I realize I need to sort the related entities.
var sections = from section in dataContext.Sections
where section.Active == true && section.ParentID == 0
orderby section.Number
select new Section
{
SectionID = section.SectionID,
Title = section.Title,
Number = section.Number,
ParentID = section.ParentID,
Timestamp = section.Timestamp,
Active = section.Active,
Children = section.Children.OrderBy(c => c.Number)
};
produces the following error.
Cannot implicitly convert type 'System.Linq.IOrderedEnumerable' to 'System.Data.Objects.DataClasses.EntityCollection'
Your model has two navigation properties Sections1 and Section1. Rename the first one to Children and the second one to Parent.
Depending on whether you have a root Section or perhaps have each top-level section parented to itself (or instead make parent nullable?), your query might look something like:-
// assume top sections are ones where parent == self
var topSections = context.Sections.Where(section => section.ParentId == SectionId);
// now put them in order (might have multiple orderings depending on input, pick one)
topSections = topSections.OrderBy(section => section.Title);
// now get the children in order using an anonymous type for the projection
var result = topSections.Select(section => new {top = section, children = section.Children.OrderBy(child => child.Title)});
For some linq examples:
http://msdn.microsoft.com/en-us/vcsharp/aa336746.aspx
This covers pretty much all of the linq operations, have a look in particular at GroupBy. The key is to understand the input and output of each piece in order to orchestrate several in series and there is no shortcut but to learn what they do so you know what's at hand. Linq expressions are just combinations of these operations with some syntactic sugar.