Is there any way to query Datastore for entities where a specific property should not be the empty string?
I'm not referring to missing properties. I really mean non empty strings.
By using filters you can specify that value of the property is greater than "" (empty string). I don't use Go so I can't guarantee if it'll work but in other languages this trick usually works...
q := datastore.NewQuery("Example").Filter("Property >", "")
Related
Is there a way to handle null value for a field in XDocReport? or do I need to manipulate it on my own? example:
if (thisVar == null)
context.put("sampleText", "");
else
context.put("sampleText", thisVar);
or is there an option in docx quick parts?
I found this line in the error message of XDocReport. However I could not understand where to apply this, in the template or in the code.
Tip: If the failing expression is known to be legally refer to
something that's sometimes null or missing, either specify a default
value like myOptionalVar!myDefault, or use [#if
myOptionalVar??]when-present[#else]when-missing[/#if]. (These only
cover the last step of the expression; to cover the whole expression,
use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
In docx, append ?if_exists to the field name
«${tx.amount?if_exists}»
you may also append !
«${tx.amount!}»
Please refer to this link for those who uses freemarker. How to check if a variable exists in a FreeMarker template?
On my application i have to search for an alphanumeric id which return one or more rows of data. On each of these rows a link is present i have to click on the first link.
Unfortunately it doesn't have any unique properties so i cannot add it to the OR. Instead i used descriptive programming something like below
'returns false
page.Link("class:=ng-binding","innertext:=AplhaID","html tag:=A").Exist
QTP fails to identify the object with the above code. So Instead of this i tried using Description object something like the below code
Set oDesc = Description.Object
oDesc("class").Value = "ng-binding"
oDesc("html tag").Value = "A"
oDesc("innertext").Value = "AplhaID"
Set lnk = page.ChildObjects(oDesc)
'gives me 2 which is correct. There are two links
msgbox lnk.Count
'highlights the correct link
lnk(0).Highlight
I do not know what could be causing this behavior. I thought is could be because multiple links match the description but I perform this search for multiple ids and eventhough multiple rows are returned the descriptive programming code is able to identify the correct row and proceed.
I looked at QTP descriptive programming issue but my link's property values do not have special characters.
In order to use Descriptive string method, ensure that you have only one object matching the given properties.
Below statement might fail if there are more than 1 object with the given properties.
page.Link("class:=ng-binding","innertext:=AplhaID","html tag:=A").Exist
So , you need to make the statement to find an object uniquely. Try this. It will work!
page.Link("class:=ng-binding","innertext:=AplhaID","html tag:=A", "index:=0").Exist
I'd like to be able to run a query like: MyModel.query(MyModel.some_property == None) and get results. I know that if I don't put a default=<some default> in a property, I won't be able to query for it, but if I set default=None will it index it?
Similarly, does setting values to None cause properties to be indexed in ndb.Model? What if you pass some_keyword_arg=None to the constructor?
I know that doing something like: ndb.StringProperty(default='') means you can query on it, just not clear on the semantics of using None.
Explicitly setting a property to None is defining a value, and yes defaults work and the property will be indexed. This assumes None is a valid value for a particular property type.
Some issues will arise, as you pointed out, often you use None as a sentinal value, so how do you tell between no Value provided and an explicit None?
I have a few million nodes large data set imported with https://github.com/jexp/batch-import .
Unfortunately, the script made relationship property names space separated as in "Some Property".
How do I ask for this property in Cypher?
As expected
r.Some Property
does not work, which is only fair.
I also tried:
r["Some Property"]
Is there a syntax for such naming?
Should I just redo the import with camel case property names or underscore separated ones?
You can return properties with spaces in the names by using backticks, `, to enclose the property name. Something like this should work in Cypher:
START r=rel(0) RETURN r.`Some Property`;
This goes for node properties as well.
you can use MATCH (r) WHERE r.type=~'Some Property.*' RETURN r;
I hope this will get you exact relation-type.
OR
MATCH (n)-[r]->() WHERE type(r)=~'S.*' It will give you all relationship started with S.
How do you save an array or an ArrayList in VB.NET using My.Settings? I cannot find the array type anywhere, even in the browse window.
I know I can convert the array to a string, but I do not know how to convert a string to an array. I know that if I were to break it at a delimiter then I could convert a string to an array, but my problem is that any text at all could be stored within the array as a single value, so I cannot pick a delimiter that is unlikely to be used.
I was also facing the same problem and I came up with a solution to this.
Here are the steps:
Open up the properties of your app and select settings
select the setting name and then where it says type click on the
arrow and select browse.
in the browse window type in system.collections.arraylist and hit enter!
there you have your array!
You can use array like this:
your_array_name(here_comes_the_item_no.) = whatever
What kind of array? I've had luck using StringCollection for strings. ArrayList works for most anything else (and that's about the only place I'd use arraylist).
I would either use the StringCollection type, and just convert your elements to/from strings when storing them in my.settings, or use XML Serialization to turn the array in to an xml string, and store that in my.settings.