I have 2 field in the input, one is primary_language & the other is secondary_language. I have a case where I have to lookup values present in these two fields and then return a specific value according to the table.
For example
If primary language is English & secondary language is null then English will be the output & if primary language is Spanish & secondary is Sign then put None in the output & so on. Can one tell how we can perform this in dataweave in mulesoft.
Do you really have some more dynamic logic or its just the two conditions you mentioned above?
you can use when/otherwise or call another flow to get the value.
%dw 1.0
%output application/java
---
{
language: 'English' when (payload.primary == 'English' and payload.secondary is :null)
otherwise ('None' when payload.primary == 'Spanish' and payload.secondary == 'Sign'
otherwise ''
),
language2: lookup("testFlow",payload)
}
I would recommend to create another flow which performs this lookup for you (potentially you could do a database call, or something else like a groovy script), and store your values and what you expect to get returned based on those values.
https://docs.mulesoft.com/mule-user-guide/v/3.7/dataweave-reference-documentation#expressions-that-call-external-flows covers this concept a little bit, but the general idea is the following:
language: lookup("myLookupFlow", payload)
Then, all you need to do is query your dataset based on primary and secondary, and you will get your "transformed" value back.
Related
I want to create a new DataFrame from another for rows that meet a condition such as:
uk_cities_df['location'] = cities_df['El Tarter'].where(cities_df['AD'] == 'GB')
uk_cities_df[:5]
but the resulting uk_cities_df is returning NaN.
The csv file that I am needing to extract from has no headers so it used the first row values for such. I need to only include rows in uk_cities_df include the ISO code "GB" so "El Tarter" denotes the values for location and "AD" for iso code.
Could you please provide a visual of what uk_cities_df and cities_df look like ?
From what I can gather, I think you might be looking for the .loc operator,
you could try for example :
uk_cities_df['location'] = cities_df.loc[cities_df['AD'] == 'GB']['location']
Also, I did not really get what role 'El Tarter' plays here, maybe you could give more details ?
I'm new to migrating the mule 3 apps to mule 4 I have done almost conversion but one expression stopped my flow and not able to achieve the logic for it if anyone has an idea regarding the expression to transform please help me
Expression:
if(flowVars.maindata.keySet().contains(payload.idCaseNumber))
{
flowVars.temporary=[];
flowVars.maindata.get(payload.idCaseNumber).add(map);
}
else
{
flowVars.temporary.add(previousdata);
vars.maindata.put(payload.idCaseNumber,temporary);
}
I have tried up to my knowledge on the above code but still I'm getting problem
flowVars.maindata.get(payload.idCaseNumber).add(map);
In Mule 3 the expression language is MEL. In Mule 4 it is DataWeave 2.0. You can't just translate directly. MEL is an imperative scripting language, similar to a subset of Java and it is easy to call Java methods. DataWeave 2.0 is a functional language. Furthermore Mule 4 operations (example: a , , etc) can only return one value, which can be assigned to the payload or to one variable.
For your snippet I'll assume that maindata is a map. You can use two set-variable to assign each variable:
<set-variable variableName="temporary" value="#[ if( namesOf(vars.maindata) contains payload.idCaseNumber ) [] else vars.temporary ++ **previousdata** ]" />
I don't know exactly what do you use for previousdata.
To update the variable maindata it is probably a good match for the update operator, in a separate or Transform operation, with the same condition than for vars.temporary.
Update:
I'll assume vars.maindata is a map, which DataWeave will consider an object, and each element is a list. As an example of doing an 'upsert' operation with a dynamic selector:
%dw 2.0
output application/java
var temporary=[5]
var maindata={ a:[1,2,3,4] }
var myKey="a"
---
maindata update {
case data at ."$(myKey)"! -> if (data != null) data ++ temporary else temporary
}
You could replace in above script the DataWeave var temporary with the expression from my example above, and the other DataWeave variables with the Mule variables (vars.name) or payload. If you change in above example myKey to have value "b" you will see that key being added.
I have a subject like "accessTo" = ["123", "123-edit"]
and a resource like "interestedId" = "123"
Now I'm trying to write a condition - where it checks "interestedId" concatenated with "-edit" equals "123-edit" in "AccessTo".
Im trying to write rule like this
anyOfAny_xacml1(function[stringEqual], "accessTo", "interestedId"+"-edit")
It is not allowing to do this.
Any help is appreciated.
In addition to the answer from Keerthi S ...
If you know there should only be one value of interestedId then you can do this to prevent the indeterminate from happening:
stringBagSize(interestedId) == 1 && anyOfAny(function[stringEqual], accessTo, stringOneAndOnly(interestedId) + "-edit")
If more than value is present then evaluation stops prior to reaching the function that expects only one value. This condition would return false if more than one value is present.
On the other hand if interestedId can have multiple values then this would work:
anyOfAny(function[stringEqual], accessTo, map(function[stringConcatenate],interestedId, "-edit"))
The map function will apply the stringConcatenate function to all values in the bag.
Since Axiomatics products are compliant with XACML specification, all attributes by default are assumed to contain multiple values(called as 'bags').
So if you would like to append a string to an attribute use stringOneAndOnly XACML function for the attribute to indicate that the attribute can have only one value.
So assuming you mean accessTo has attribute ID as Attributes.access_subject.subject_id, interestedId has the attribute ID as Attributes.resource.resource_id and anyOfAny_xacml1 is equivalent to anyOfAny XACML function, the resulting condition would look like,
anyOfAny(function[stringEqual], Attributes.access_subject.subject_id, stringOneAndOnly(Attributes.resource.resource_id) + "-edit")
In Mule4, I need to convert json sample data in to dynamic XML format, I have tried with dataweave(2.0) field mapping, getting null values. Does anyone can help me on this?
If the question is just asking out to build up XML output from JSON input, that is a pretty open-ended question. What do you want to evaluate dynamically? You could, for example, use part of the payload to set values in the DataWeave expression.
There is a more difficult version of this question: how to dynamically evaluate DataWeave code constructed into an input string, where this string could be read from various script files, or even constructed in-line from some input data (payload, attributes, or variables).
Here is another example covered in our MuleSoft DataWeave training course at http://training.mulesoft.com.
You can use a Dynamic Evaluate component to dynamically evaluate a constructed DataWeave expression string. Here is an example that replaces the uName parameter with a dynamic value.
Also, the expression is configured to read in different script files based on some condition:
output application/json
---
do {
var choice = attributes.queryParams.script default "NO_SCRIPT"
---
if(choice == "NO_SCRIPT")
"output application/json --- {result: 'NO SCRIPT ENTERED'}"
else if(choice == "script1") vars.script1
else if (choice == "script2") vars.script2
else read(choice)
}
Here are two example scripts that substitutes values for uName and produce different types of output (XML vs. JSON).
This is script1:
output application/xml
---
root: { message: "order "
++ attributes.queryParams.orderid
++ " has been received from "
++ uName, items: payload.items}
This is script2:
output application/json
---
root: { message: "Order2 "
++ attributes.queryParams.orderid
++ " has been received from "
++ uName, items: payload.items}
Notice that this example is dangerous. It lets the web client inject any DataWeave code into the Mule flow, so this example should never be copied into production code, but it does demonstrate the ability to run any DataWeave code passed into a Mule application.
I'm trying to add a string length field to an index. Ideally, I'd like to use the kibana script feature as I can 'add' this field later but I keep getting a null_pointer_exception with the following code... I'm trying to sort in a visualization based on the fields length.
doc['field'].value ? doc['field'].length() : 0
Is this correct?
I thought it was because my field isn't always set (sparse data), but I added the ?:0 to combat that (which didn't work)
Any ideas?
You can define an scripted field in Kibana, of type int, language painless, and try this:
return (doc['field'].value != null? doc['field'].value.length(): 0);