OPA Rego function statement evaluation order - open-policy-agent

package play
exists(obj, a) {
obj[a]
}
hello {
exists(input, "department")
contains(input["location"], "London")
}
world {
contains(input["location"], "London")
exists(input, "department")
}
input = {
"department": "Eng",
"location": "London" }
Above code matches only hello. Why world does not match even when the conditions are same, but order reversed ?

The order of the statements does not matter. You've actually found a bug!
If you change the example slightly so that exists is not called with input as the first argument but instead something like exists(input.user, "department") and then you update the input document to reflect that:
{"user": {"department": "Eng", "location": "London"}}
You'll observe the correct behaviour (e.g., world { contains(input.user["location"], "London"); exists(input.user, "department") }).

Related

Restassured: How Can we compare each element in Json array to one particular Same value in Java using Hemcrest Matchers, not using Foreach loop

Restassured: How Can we compare each element in Json array to one particular Same value in Java using Hemcrest Matchers, not using Foreach loop.
{
"id": 52352,
"name": "Great Apartments",
"floorplans": [
{
"id": 5342622,
"name": "THE STUDIO",
"fpCustomAmenities": [
{
"displaySequence": 2,
"amenityPartnerId": "gadasd",
"display": true,
"leased": true
},
{
"displaySequence": 13,
"amenityPartnerId": "sdfsfd",
"display": true,
"leased": true
}
]
},
{
"id": 4321020,
"name": "THE First Bed",
"fpCustomAmenities": [
{
"displaySequence": 4,
"amenityPartnerId": "gadasd",
"display": true,
"leased": true
},
{
"displaySequence": 15,
"amenityPartnerId": "hsfdsdf",
"display": true,
"leased": true
}
]
}
]
}
I want to compare that Leased=true for all the leased nodes at all the levels in the json response...
I have working code...
List<List<Boolean>> displayedvaluesfpStandardAmenities =
when().get(baseUrl + restUrl).
then().statusCode(200).log().ifError().
extract().body().jsonPath().getList("floorplans.fpCustomAmenities.display");
for (List<Boolean> displayedStandardList : displayedvaluesfpStandardAmenities) {
for (Boolean isDisplayedTrue : displayedStandardList) {
softAssert.assertTrue(isDisplayedTrue);
}
}
But the issue is I need the code to be in simple format using either Hemcrest Matchers or Restaussred Matchers and try simplistic way like Below, ( which is not working)
when().get(baseUrl + restUrl).
then().assertThat().body("floorplans.fpCustomAmenities.display",equalTo("true"));
The error I am getting is
java.lang.AssertionError: 1 expectation failed.
JSON path floorplans.fpCustomAmenities.display doesn't match.
Expected: true
Actual: <[[true, true], [true, true]]>
So what I need is the that all thes 'display' nodes in the json response where ever it is need to compared with "true", so that my test can Pass.
I have an alternate solution like mentioned above, but All I need is working solution using matchers.
Assuming fpCustomAmenities arrays are not empty, you can use the following solution;
when().get(baseUrl + restUrl).then()
.body("floorplans.findAll { it }.fpCustomAmenities" + // 1st line
".findAll { it }.leased.each{ a -> println a }" + // 2nd line
".grep{ it.contains(false) }.size()", equalTo(0)); // 3rd line
Here from the 1st line, we return each object in fpCustomAmenities array.
From the 2nd line we get boolean value of leased in each fpCustomAmenities object to a boolean array ([true, true]).
Each boolean array is printed from .each{ a -> println a }. I added it only to explain the answer. It is not relevant to the solution.
From 3rd line we check whether, if there is a false in each boolean array. grep() will return only the arrays which has a false. And then we get the filtered array count. Then we check whether it is equal to 0.
Check groovy documentation for more details.
Or
This solution does not use any Matchers. But this works.
String responseBody = when().get(baseUrl + restUrl).
then().extract().response().getBody().asPrettyString();
Assert.assertFalse(responseBody.contains("\"leased\": false"));

Nested query GraphQL : Syntax error - iOS

I am working with Apollo GraphQL and have to call nested query .But while call the Query in .graphql file it showing
Syntax error : Expected Name, found {
Let me know how to call Nested query of GraphQL.
I have to call getAllproduct{....} query with the specified parameters.Here the FilterInput having the parameter as location with another pattern of query , so I don't know how to call this nested query.Anyone please help me to find out the solution.Thanks...
If an argument is an Input Object Type (as opposed to a Scalar), you can include the fields of the Input Object Type by using curly brackets.
query MyProductsQuery {
allProducts(
pageNumber: "someString"
filter: {
title: "someOtherString"
yearFrom: 1900
location: {
city: "yetAnotherString"
state: "FL"
}
}
) {
id
# other product fields
}
}
Of course, hardcoding those values in a .graphql file is not very helpful. You probably want to be able to swap those values out programatically. So here's what that same query looks like with variables:
query MyProductsQuery($pageNumber: String, $filter: FilterInput) {
allProducts(pageNumber: $pageNumber, filter: $filter) {
id
# other product fields
}
}
Your variables are passed in separately from your query and unlike your query, are not a GraphQL document. They are just JSON:
{
"pageNumber": "someString",
"filter": {
"title": "someOtherString",
"yearFrom": 1900,
"location": {
"city": "yetAnotherString",
"state": "FL"
}
}
}

iOS Swit 3 - filter array inside filter

I would like to filter array inside a filter. First I have a big array of Staff object (self.bookingSettings.staffs). Inside this array I have multiple object like this :
"staffs": [
{
"id": 1,
"name": "Brian",
"services": [
{
"id": 1
},
{
"id": 2
},
{
"id": 3
},
{
"id": 4
}
],
"pos": 1
},...
I would like to filter this array in order to have only services with id = 3.
I succeed to have if first object is equal to 3 with this code :
self.bookingSettings.staffs.filter({ $0.services.first?.id == self.bookingService.id })
but that takes only the first item.
I think I have to filter inside my filter function, something like this to loop over all object inside services :
self.bookingSettings.staffs.filter({ $0.services.filter({ $0.id == self.bookingService.id }) })
but I've the following error: Cannot convert value of type [BookingService] to closure result type Bool.
Is this a good idea ? How can I achieve this ?
You could use filter, which would look something like this:
self.bookingSettings.staffs.filter {
!$0.services.filter{ $0.id == self.bookingService.id }.isEmpty
}
This code is constructing an entire array of filtered results, only to check if its empty and immediately discard it. Since filter returns all items that match the predicate from the list, it won't stop after it finds a match (which is really what you're looking for). So even if the first element out of a list of a million elements matches, it'll still go on to check 999,999 more elements. If the other 999,999 elements also match, then they will all be copied into filter's result. That's silly, and can use way more CPU and RAM than necessary in this case.
You just need contains(where:):
self.bookingSettings.staffs.filter {
$0.services.contains(where: { $0.id == self.bookingService.id })
}
contains(where:) short-circuits, meaning that it won't keep checking elements after a match is found. It stops and returns true as soon as find a match. It also doesn't both copying matching elements into a new list.

ElasticSearch writing query for priority search

I am new to elastisearch and I just set it up and tried default search. I am using elasticsearch rails gem. I need to write custom query with priority search (some fields in table are more important then others, etc. title, updated_at in last 6 months...). I tried to find explanation or tutorial for how to do this but nothing seems understandable. Can anyone help me with this, soon better.
Never having used the ruby/elasticsearch integration, it doesn't seem too hard... The docs here show that you'd want to do something like this:
client.search index: 'my-index', body: { query: { match: { title: 'test' } } }
To do a basic search.
The ES documentation here shows how to do a field boosted query:
{
"multi_match" : {
"query" : "this is a test",
"fields" : [ "subject^3", "message" ]
}
}
Putting it all together, you'd do something like this:
client.search index: 'my-index', body: { query: { multi_match : {
query : "this is a test",
fields : [ "subject^3", "message" ]
} } }
That will allow you to search/boost on fields -- in the above case, the subject field is given 3 times the score of the message field.
There is a very good blog post about how to do advanced scoring. Part of it shows an example of adjusting the score based on a date:
...
"filter": {
"exists": {
"field": "date"
}
},
"script": "(0.08 / ((3.16*pow(10,-11)) * abs(now - doc['date'].date.getMillis()) + 0.05)) + 1.0"
...
I have done in php, Never used the gem from Ruby on rails. Here you can give the priority for the fields using the caret (^) notation.
Example:- Suppose if we have fields namely name, email, message and address in table and the priority should be given for the name and message then you can write as below
> { "multi_match" : {
> "query" : "this is a test",
> "fields" : [ "name^3", "message^2".... ] } }
Here name has 3 times higher priority than other fields and message has got 2 times higher priority than other fields.

dust js: aliasing an object not working

Template
{#person alias=root}{alias.value}: {name}, {age}{/person}
data:
{
"root": {value:"MR."},
"person": {
"name": "Larry",
"age": 45
}
}
Expected output:
MR. Larry, 45
Actual output:
: Larry, 45
I'm trying to alias an object like shown above. But its not working. Please have a look into this fiddle http://jsfiddle.net/G86mu/1/.
If i replace {value:"MR."} with a string say "root":"Mr." and change my template to
{#person alias=root}{alias}: {name}, {age}{/person}
the output is as expected. Please let me know how do i alias an object
The reason this isn't working is because the context within Dust is not the same as the JSON you pass in to dust.render. Internally, Dust wraps your JSON so that it can include params, globals, and blocks in the context.
So, you are not adding alias to the current context, as you might assume. Instead, you are adding alias one level above your current context. Although the representation isn't exactly accurate, it should be helpful for explanation purposes:
// Incorrect:
{
"root": {
"value": "MR."
},
"person": {
// Current context
"alias": {
"value": "MR."
},
"name": "Larry",
"age": "45"
}
}
// (more) correct:
{
"root": {
"value": "MR."
},
"alias": {
"value": "MR."
"person": {
// Current context
"name": "Larry",
"age": "45"
}
}
}
When the context is viewed in this way, it makes sense why {#person alias=root}{alias.value}: {name}, {age}{/person} will not work. When using the dot-notation inside of a reference (as in {alias.value}, dust starts in the current context and goes down. Since there is no "alias" object inside of the current context, dust gives up, and you get an empty string.
However, if when you don't use the dot-notation, dust starts at the current context and searches up. The first time it finds a match, it will use that match. So, for your example, you could use the following to get your expected output.
{#person alias=root}{#alias}{value}{/alias}: {name}, {age}{/person}
Alternatively, if you could use:
{#person aliasVal=root.value}{aliasVal}: {name}, {age}{/person}

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