How to perform n time or query using ORM? - django

I have an array of values
values['value1','value2'....n]
I want to perform the following query
res = TheModel.objects.filter(key=values[0] or key = values[1] or key = values[2]...n)
Here the problem is array size may be different every time.
How can I achieve this?


You can use __in filter:
res = TheModel.objects.filter(key__in=values)

Related

I am trying to get the difference of measure values in DAX but getting 0

I will like to get the difference between two measure values using DAX
AADPMAU_Increase = [AADPMAU_End] - [AADPMAU_Start]
But when I do the subtraction, I am getting 0
I have tried different things, but nothing is working
The two values are start and end values that are set by date selector filters. It appears that the calculation is always treating both as equal therefore returning 0
AADPMAU_Start = CALCULATE(AADPTable[AADPMAU_Sum],FILTER(DimDate,DimDate[StartDate] = DimDate[StartDate]))
AADPMAU_End = CALCULATE(AADPTable[AADPMAU_Sum],FILTER(DimDate,DimDate[EndDate] = DimDate[EndDate]))
AADPMAU Increase =
var at_end = AADPTable[AADPMAU_End]
var at_start = AADPTable[AADPMAU_Start]
return at_end - at_start

get Unique record among Duplicates Using mapReduce

File.txt
123,abc,4,Mony,Wa
123,abc,4, ,War
234,xyz,5, ,update
234,xyz,5,Rheka,sild
179,ijo,6,all,allSingle
179,ijo,6,ball,ballTwo
1) column1,column2,colum3 are primary Keys
2) column4,column5 are comparision Keys
I have a file with duplicate records like above In this duplicate record i need to get only one record among duplicates based on sorting order.
Expected Output:
123,abc,4, ,War
234,xyz,5, ,update
179,ijo,6,all,allSingle
Please help me. Thanks in advance.

You can try the below code:
data = LOAD 'path/to/file' using PigStorage(',') AS (col1:chararray,col2:chararray,col3:chararray,col4:chararray,col5:chararray);
B = group data by (col1,col2,col3);
C = foreach B {
sorted = order data by col4 desc;
first = limit sorted 1;
generate group, flatten(first);
};
In the above code, you can change the sorted variable to choose the column you would like to consider for sorting and the type of sorting. Also, in case you require more than one record, you can change the limit to greater than 1.
Hope this helps.

Questions isn't soo clear , but I understand this is what you need :
A = LOAD 'file.txt' using PigStorage(',') as (column1,column2,colum3,column4,column5);
B = GROUP A BY (column1,column2,colum3);
C = FOREACH B GENERATE FLATTERN(group) as (column1,column2,colum3);
DUMP C;
Or
A = LOAD 'file.txt' using PigStorage(',') as (column1,column2,colum3,column4,column5);
B = DISTINCT(FOREACH A GENERATE column1,column2,colum3);
DUMP B;

PYOMO: Indexing set of tuples

I want to create an indexing set of tuples, i mean if i do:
LINEAS_DOWNSTREAM_BARRA[1] I want to see [(1,3),(1,2),(1,4)].
My code is:
m=ConcreteModel()
m.BARRAS = Set()
m.LINEAS_DOWNSTREAM_BARRA = Set(dimen = 2)
m.LINEAS_DOWNSTREAM_BARRA = Set(m.BARRAS, initialize=lambda m, i:
set(tuple(z) for z in m.LINEAS if (i == z[0])))
And the problem is:
ValueError: The value=(1, 2) is a tuple for
set=LINEAS_DOWNSTREAM_BARRA, which has dimen=1
Thanks!!

You should declare the Set m.LINEAS_DOWNSTREAM_BARRA on a single line. Also, make sure that your lambda function is returning a list of tuples
m.LINEAS_DOWNSTREAM_BARRA = Set(m.BARRAS, dimen=2, initialize=your_lambda_fcn)

Why does Relation.size sometimes return a Hash in Rails 4

I can run a query in two different ways to return a Relation.
When I interrogate the size of the Relation one query gives a Fixnum as expected the other gives a Hash which is a hash of each value in the Relations Group By statement with the number of occurrences of each.
In Rails 3 I assume it always returned a Fixnum as I never had a problem whereeas with Rails 4 it sometimes returns a Hash and a statement like Rel.size.zero? gives the error:
undefined method `zero?' for {}:Hash
Am I best just using the .blank? method to check for zero records to be sure of avoiding unexpected errors?
Here is a snippet of code with looging statements for the two queries and the resulting log
CODE:
assessment_responses1=AssessmentResponse.select("process").where("client_id=? and final = ?",self.id,false).group("process")
logger.info("-----------------------------------------------------------")
logger.info("assessment_responses1.class = #{assessment_responses1.class}")
logger.info("assessment_responses1.size.class = #{assessment_responses1.size.class}")
logger.info("assessment_responses1.size value = #{assessment_responses1.size}")
logger.info("............................................................")
assessment_responses2=AssessmentResponse.select("distinct process").where("client_id=? and final = ?",self.id,false)
logger.info("assessment_responses2.class = #{assessment_responses2.class}")
logger.info("assessment_responses2.size.class = #{assessment_responses2.size.class}")
logger.info("assessment_responses2.size values = #{assessment_responses2.size}")
logger.info("-----------------------------------------------------------")
LOG
-----------------------------------------------------------
assessment_responses1.class = ActiveRecord::Relation::ActiveRecord_Relation_AssessmentResponse
(0.5ms) SELECT COUNT(`assessment_responses`.`process`) AS count_process, process AS process FROM `assessment_responses` WHERE `assessment_responses`.`organisation_id` = 17 AND (client_id=43932 and final = 0) GROUP BY process
assessment_responses1.size.class = Hash
CACHE (0.0ms) SELECT COUNT(`assessment_responses`.`process`) AS count_process, process AS process FROM `assessment_responses` WHERE `assessment_responses`.`organisation_id` = 17 AND (client_id=43932 and final = 0) GROUP BY process
assessment_responses1.size value = {"6 Month Review(1)"=>3, "Assessment(1)"=>28, "Assessment(2)"=>28}
............................................................
assessment_responses2.class = ActiveRecord::Relation::ActiveRecord_Relation_AssessmentResponse
(0.5ms) SELECT COUNT(distinct process) FROM `assessment_responses` WHERE `assessment_responses`.`organisation_id` = 17 AND (client_id=43932 and final = 0)
assessment_responses2.size.class = Fixnum
CACHE (0.0ms) SELECT COUNT(distinct process) FROM `assessment_responses` WHERE `assessment_responses`.`organisation_id` = 17 AND (client_id=43932 and final = 0)
assessment_responses2.size values = 3
-----------------------------------------------------------

size on an ActiveRecord::Relation object translates to count, because the former tries to get the count of the Relation. But when you call count on a grouped Relation object, you receive a hash.
The keys of this hash are the grouped column's values; the values of this hash are the respective counts.
AssessmentResponse.group(:client_id).count # this will return a Hash
AssessmentResponse.group(:client_id).size # this will also return a Hash
This is true for the following methods: count, sum, average, maximum, and minimum.
If you want to check for rows being present or not, simply use exists? i.e. do the following:
AssessmentResponse.group(:client_id).exists?
Instead of this:
AssessmentResponse.group(:client_id).count.zero?

Doctrine2 ODM Count() does not count integer values

i m using Zendframework2 and using count function to count the number of values, it fails when i try to count the integer values
$q = $dm->createQueryBuilder('Admin\Document\Institution')
->field('id')->notEqual($id)
->field('coreid')->equals($post['coreid']);
$coreid = $q->getQuery()->execute()->count();
does count function works for integer valeues in Doctrine2 ODM?

If you change your query slightly then possibly get your count value.
$q = $dm->createQueryBuilder('Admin\Document\Institution')
->select('count(id) as id')
->where('id !=:id AND coreid != :coreid')
->setParameters(array('id'=> $id,'coreid'=>$coreid);
$coreid = $q->getQuery()->execute();