So my Top-Level problem is I am trying to return whether a MERGE resulted in the creation of a new Node or not.
In order to do this I was thinking I could just create a simple temp boolean setting it to TRUE using ON CREATE
How I imagine it working:
MERGE(: Person {id:'Tom Jones'})
WITH false as temp_bool
ON CREATE set temp_bool = true
RETURN temp_bool
Obviously this does not work.
I am looking for a way to create arbitrary temp values within a Cypher query, and have the ability to return those variables in the end.
Thanks
You can do what you want, here's how (combination of my first answer, with #cybersam's addition). You just do it with a node property you create and then remove, instead of an unbound variable as you've been trying.
MERGE(tom:Person {id:'Tom Jones'})
ON CREATE set tom.temp_bool = true
ON MATCH set tom.temp_bool = false
WITH tom, tom.temp_bool AS result
REMOVE tom.temp_bool
RETURN result;
In simple merging cases like this where maximum one node could be created, a cleaner way to achieve what you are looking for could be checking the result stats. I case of using Bolt API you should check:
results.consume().counters.nodes_created = 1
Related
Looks like a silly question, but I can't find a way to access the DataViews in my DataViewManager.
I can see it in the DataViewManager Visualizer window, so there must be a way.
What am I doing wrong?
dvm = New DataViewManager(MyDS) ''-- MyDS is a strongly typed dataset
dvm.CreateDataView(MyDS.Company)
dvm.CreateDataView(MyDS.Sites)
MsgBox(dvm.DataViewSettings.Count) ''-- shows 7, even though I added only 2.
For Each view As DataView In dvm ''-- Error!
MsgBox(view.Table.TableName)
Next
I also observed that irrespective of how many DataViews I create, data the DataViewManager Visualizer shows all DataViews in my dataset. Why?
how do I hide those rows in parent whose child data view returns 0 rows after applying RowFilter on child
I've done it like this, but it feels like a nasty hack; I've never read the source deeply enough to know if there is a better way:
Add a column to your child datatable: Name: IsShowing, Type: Int, Expression: 1, ReadOnly: True
Put the following code:
ChildBindingSource.RemoveFilter()
ParentBindingSource.RemoveFilter()
YourDataSet.ChildDataTable.IsShowingColumn.Expression = ""
YourDataSet.ChildDataTable.Expression = $"IIF([SomeColumn] Like '{SomeFilterText}',1,0)"
ChildBindingSource.Filter = "[IsShowing] > 0"
ParentBindingSource.Filter = "Sum(Child.IsShowing) > 0"
The removal and re-add triggers a re-evaluation of the expression and the filters. There is probably a way to do this without removing/re-adding but I haven't yet found it.. Expressions are normally only re-evaluated when row data changes; changing an expression doesn't seem to recalculate all the row values/trigger a refresh of the relations and BS filters
It would be great if the parent filter supported complex expressions like SUM(IIF(Child.SomeColumn = 'SomeFilter',1,0)>0 but the SUM operator expects only a column name in the parent or child. As such, the circuitous route of having a column with an Expression be the part inside the SUM is the only way i've found to leverage the built in filtering
Remember when you test that the search is case sensitive. If you want it not to be you might have to have another column of data that is the lowercase version of what you want to search and lowercase your query string
I have a generic (non-V) class with a LINKMAP field that links a chain of time-series data. Each record links to the next record based on a key of the next month/day/hour/etc. and a value of the #rid of the next record. I could use edges (non-lightweight, with a single property the same as the LINKMAP key), but I don't want to because I only need a one-direction link and want to use the least amount of storage space (plus my assumption is that while using edges might offer slightly easier querying, it wouldn't offer any benefit in terms of performance or storage space).
I currently have the following batch query:
begin;
let r = select from data where key='AAA';
let y = select expand(links['2017']) from $r;
let m = select expand(links['07']) from $y;
let d = select expand(links['15']) from $m;
let h = select expand(links['10']) from $d;
return (select $r[0], $y[0], $m[0], $d[0], $h[0])
This works, in the sense that I get a result set with the #rids of each record in the link'ed list.
I have two questions:
Is there a more efficient way to do this query? I've tried various TRAVERSE options with $path and such, but nothing else I attempted worked at all. I did not try MATCH because I'm not using edges.
The current result set is flat, with each value prop ($r, $y, etc.) containing the corresponding #rid. That's OK for my purposes, but I'd like to know if there's a way to return the actual records instead of just the #rids. Nothing I've tried works.
PS - I'm using orientjs, but the batch runs identically from the console as well.
Please forgive me if my question does not make sense.
What im trying to do is to inject in values for query parameters
GET1 File
Scenario:
Given path 'search'
And param filter[id] = id (default value or variable from another feature file)
POST1 File
Scenario:
def newid = new id made by a post call
def checkid = read call(GET1) {id : newid}
like if one of my feature files creates a new id then i want to do a get call with the above scenario. therefore i need a parameter there which takes in the new id.
On the other hand if i do not have an id newly created or the test creating it is not part of the suite. i want to still be able to run the above mentioned scenario but this time it has a default value to it.
Instead of param use params. It is designed so that any keys with null values are ignored.
After the null is set on the first line below, you can make a call to another feature, and overwrite the value of criteria. If it still is null, no params will be set.
* def criteria = null
Given path 'search'
And params { filter: '#(criteria)' }
There are multiple other ways to do this, also refer to this set of examples for data-driven search params: dynamic-params.feature
The doc on conditional logic may also give you some ideas.
According to the Peoplebook here, CreateRowset function has the parameters {FIELD.fieldname, RECORD.recname} which is used to specify the related display record.
I had tried to use it like the following (just for example):
&rs1 = CreateRowset(Record.User, Field.UserId, Record.UserName);
&rs1.Fill();
For &k = 1 To &rs1.ActiveRowCount
MessageBox(0, "", 999999, 99999, &rs1(&k).UserName.Name.Value);
End-for;
(Record.User contains only UserId(key), Password.
Record.UserName contains UserId(key), Name.)
I cannot get the Value of UserName.Name, do I misunderstand the usage of this parameter?
Fill is the problem. From the doco:
Note: Fill reads only the primary database record. It does not read
any related records, nor any subordinate rowset records.
Having said that, it is the only way I know to bulk-populate a standalone rowset from the database, so I can't easily see a use for the field in the rowset.
Simplest solution is just to create a view, but that gets old very soon if you have to do it a lot. Alternative is to just loop through the rowset yourself loading the related fields. Something like:
For &k = 1 To &rs1.ActiveRowCount
&rs1(&k).UserName.UserId.value = &rs1(&k).User.UserId.value;
&rs1(&k).UserName.SelectByKey();
End-for;
I was looking at another question in stackoverflow regarding auto increment fields in orientdb, where one of the answers was to create our own vertex with counter field.
However, when I'm trying to execute the following code (both java api and console script batch), It is not working.
Do note however that the id is returned good (did some debug attempts, returning the id variable only), and the vertex is created.
However, the vertex id is always null (unless I set it explicit, that is).
The script:
script sql
LET id = UPDATE CCounter INCREMENT value=1 RETURN AFTER $current WHERE name='session'
LET csession = CREATE VERTEX CDate SET id=$id.result, meet_date='2015-01-01 15:23:00'
end
I tried playing around with $id and $current , but nothing seems to work.
Currently I am doing it in a 2-transaction mode; one to get the id, and another to create the vertex. I really hope there is a better way though.
P.S.
I am using version 2.0-M2
You should execute
LET csession = CREATE VERTEX CDate SET id=$id.value, meet_date='2015-01-01 15:23:00'
Note the $id.value in place of $id.result.
As stated in a comment to Lvca, the answer was:
(1) Change the field name. Id seems to be reserved (ish). It's probably possible to still bypass it and use a field named 'id', but I didn't want to mess around with it.
(2) From some reason, the result was a collection (shown as '[id]'). It took me some time to figure it out, but I just had to choose the first value from it.
(3) Also, there are 2 'values' here. One of the field ($current.value), and the second one(not sure where it's coming from).
Final solution that works:
script sql
LET id = UPDATE CCounter INCREMENT value = 1 RETURN AFTER $current.value WHERE name='session'
LET csession = CREATE VERTEX CDate SET data_id=$id[0].value, meet_date='2015-01-01 15:23:00'
end