I have the following code:
cts:and-query((
cts:element-word-query(xs:QName("primaryie"), $textname, "case-insensitive"),
cts:element-query(xs:QName("beginpage"),
cts:and-query(()))
))
but would like to add a cts:or-query to find the hightlighed "docpage" but can't figure out what to use. I tried cts:element-query but I think it isn't an element. It seems like a marker or something. Any suggestions?
There is not currently a way to create an index on a processing-instruction() (using a path-range-index or otherwise).
If you are already leveraging the envelope pattern, you could materialize that processing-instruction() as an element in your envelope i.e. <docpage num="i"/> and then use cts:element-attribute-value-query()
cts:and-query((
cts:element-word-query(xs:QName("primaryie"), $textname, "case-insensitive"),
cts:or-query((
cts:element-query(xs:QName("beginpage"),
cts:element-attribute-value-query(xs:QName("docpage"), xs:QName("num"), "i")
))
))
Or you could create a document property and then use cts:properties-fragment-query()
cts:and-query((
cts:element-word-query(xs:QName("primaryie"), $textname, "case-insensitive"),
cts:or-query((
cts:element-query(xs:QName("beginpage"),
cts:document-fragment-query(
cts:element-attribute-value-query(xs:QName("docpage"), xs:QName("num"), "i")
)
))
))
Otherwise, you would need to perform filtering via XPath on the search results.
cts:search(doc(),
cts:element-word-query(xs:QName("primaryie"), $textname, "case-insensitive")
)[book/(beginpage or processing-instruction("docpage") = 'num="i"')]
This would require filtering(reading through the matched docs), so how quickly this query responds will depend upon the number of documents that are returned from the search criteria, and the limits you place on how many docs to return.
Related
This is a little strange, but I have a situation where it'd be beneficial for me to know which traversal an element came from.
For a simple example, something like this:
.union(
select('parent').out('contains'), //traversal 1
select('parent2').out('contains') //traversal 2
)
.dedup()
.project('id','traversal')
.by(id())
.by( //any way to determine which traversal it came from? or if it was in both? )
Edit: One thing I found is that I can use Map with Group/By to get partly there:
.union(
select('parent').out('contains')
.map(group().by(identity()).by(constant('t1'))),
select('parent2').out('contains')
.map(group().by(identity()).by(constant('t2'))),
)
.dedup() //Dedup isn't gonna work here because each hashmap will be different.
.project('id','traversal')
.by( //here I can't figure out how to read a value from the hashmap inline )
The above query without the project/by piece returns this:
[{v[199272505353083909]: 't1'}, {v[199272515180338177]: 't2'}]
Or is there a better way to do this?
Thanks!
One simple approach might be to just fold the results. If you get back an empty list you will know you did not find any on that "branch":
g.V('44').
union(out('route').fold().as('a').project('res','branch').by().by(constant('b1')),
out('none').fold().as('b').project('res','branch').by().by(constant('b2')))
which yields
{'res': [v[8], v[13], v[20], v[31]], 'branch': 'b1'}
{'res': [], 'branch': 'b2'}
UPDATED after discussion in comments to include an alternative approach that uses nested union steps to avoid the project step inside the union. I still think I prefer the project approach unless the performance when measured is not good.
g.V('44').
union(local(union(out('route').fold(),constant('b1')).fold()),
local(union(out('none').fold(),constant('b2')).fold()))
which yields
[[v[8], v[13], v[20], v[31]], 'b1']
[[], 'b2']
I'm creating a xamarin.forms application, and we use sqlite-net-plc by Frank A. Krueger. It is supposed to support full text searching, which I am trying to implement.
Now, full text search seems to work. I created a query like:
SELECT * FROM Document d JOIN(
SELECT document_id
FROM SearchDocument
WHERE SearchDocument MATCH 'test*'
) AS ranktable USING(document_id)
which seems to work fine. However, I'd like to return the results in order of their rank, otherwise the result is useless. According to the documentation (https://www.sqlite.org/fts3.html), the syntax should be:
SELECT * FROM Document d JOIN(
SELECT document_id, rank(matchinfo(SearchDocument)) AS rank
FROM SearchDocument
WHERE SearchDocument MATCH 'test*'
) AS ranktable USING(document_id)
ORDER BY ranktable.rank
However, the engine doesn't seem to know the "rank" function:
[ERROR] FATAL UNHANDLED EXCEPTION: SQLite.SQLiteException: no such function: rank
It does know the "matchinfo" function though.
Can anyone tell me what I'm doing wrong?
Edit: After some more searching it seems that the rank function is simply not implemented in the library. I'm confused. How can people use the fulltext search without caring about the order of the results? Is there some other way of ordering the results so that the most relevant results are at the top?
It depends on SQLitePCLRaw.bundle_green. It's worth looking into that.
I'm trying to populate a list with a dataset and set the selected option with a helper function that compares the current data with another object's data (the 2 objects are linked)
I made the same type of list population with static variables:
Jade-
select(name='status')
option(value='Newly Acquired' selected='{{isCurrentState "Newly Acquired"}}') Newly Acquired
option(value='Currently In Use' selected='{{isCurrentState "Currently In Use"}}') Currently In Use
option(value='Not In Use' selected='{{isCurrentState "Not In Use"}}') Not In Use
option(value='In Storage' selected='{{isCurrentState "In Storage"}}') In Storage
Coffeescript-
"isCurrentState" : (state) ->
return #status == state
This uses a helper isCurrentState to match a given parameter to the same object that my other code is linked to so I know that part works
The code I'm trying to get to work is :
Jade-
select.loca(name='location')
each locations
option(value='#{siteName}' selected='{{isCurrentLocation {{siteName}} }}') #{siteName}
Coffeescript-
"isCurrentLocation": (location) ->
return #locate == location
All the other parts are functioning 100%, but the selected part is not
I've also tried changing the way I entered the selected='' part in a manner of ways such as:
selected='{{isCurrentLocation "#{siteName}" }}'
selected='{{isCurrentLocation "#{siteName} }}'
selected='{{isCurrentLocation {{siteName}} }}'
selected='#{isCurrentLocation "{{siteName}}" }'
selected='#{isCurrentLocation {{siteName}} }'
selected='#{isCurrentLocation #{siteName} }'
Is what I'm trying to do even possible?
Is there a better way of achieving this?
Any help would be greatly appreciated
UPDATE:
Thanks #david-weldon for the quick reply, i've tried this out a bit and realised that I wasn't exactly clear in what I was trying to accomplish in my question.
I have a template "update_building" created with a parameter( a buidling object) with a number of attributes, one of which is "locate".
Locations is another object with a number of attributes as well, one of which is "siteName". One of the siteName == locate and thus i need to pass in the siteName from locations to match it to the current building's locate attribute
Though it doesn't work in the context I want to use it definitely pointed me in a direction I didn't think of. I am looking into moving the parent template(The building) date context as a parameter into the locations template and using it from within the locations template. This is easily fixable in normal HTML spacebars with:
{{>locations parentDataContext/variable}}
Something like that in jade would easily solve this
Short answer
selected='{{isCurrentLocation siteName}}'
Long answer
You don't really need to pass the current location because the helper should know it's own context. Here's a simple (tested) example:
jade
template(name='myTemplate')
select.location(name='location')
each locations
option(value=this selected=isCurrentLocation) #{this}
coffee
LOCATIONS = [
'Newly Acquired'
'Currently In Use'
'Not In Use'
'In Storage'
]
Template.myTemplate.helpers
locations: LOCATIONS
isCurrentLocation: ->
#toString() is Template.instance().location.get()
Template.myTemplate.onCreated ->
#location = new ReactiveVar LOCATIONS[1]
I looked into the datacontexts some more and ended up making the options that populate the select into a different template and giving that template a helper, accessing the template's parent's data context and using that to determine which location the building had saved in it so that I could set that option to selected
Jade-
template(name="location_building_option")
option(value='#{siteName}' selected='{{isSelected}}') #{siteName}
Coffeescript -
Template.location_building_option.helpers
'isSelected': ->
parent = Template.parentData(1)
buildSite = parent.locate
return #siteName == buildSite
Thanks #david-weldon, Your answer helped me immensely to head in the right direction
I have an entry level question which my book could not help with and I also confused a colleague. Can I use RDF without specifiying prefixes and how do I specificy the predicate in the SPARQL query?
I'm doing this in R's RRDF package but if I set up a store as
A=new.rdf(ontology=F)
add.triple(A,"Ian","sonOf","Daddy")
add.triple(A,"Ian","sonOf","Mummy")
add.triple(A,"Ian","likes","Chocolate")
I get the following message
## Error: com.hp.hpl.jena.query.QueryParseException: Lexical error
at line 1, column 40. Encountered: " " (32), after : "sonOf"
to the query
sparql.rdf(A, "select ?son ?parent where {?son sonOf ?parent}")
Can I use sonOf in this way? Do I have to set up my own Schema first? Am I doing something fundamentally wrong? Do I have to use prefixes if all my data resides on the same data source?
An RDF predicate is always a URI (technically, actually a IRI, but let's set that aside).
It can be specified as a prefixed name:
namespace:sonOf
or an IRIRef, e.g:
<http://my.namespace.com#sonOf>
but I don't think it can be given as a plain label like you are attempting.
If you use the prefixed name style, then the prefix must be defined and bound to a namespace, so that a valid URI can be constructed from your input.
(The formal grammar is given in the SPARQL Specification.)
In the rrdf R package, the following syntax seemed to work:
library(rrdf)
D = new.rdf(ontology = F)
add.triple(D, "ian", "w:likes", "food")
add.triple(D, "ian", "w:hates", "homework")
sparql.rdf(D, "select ?child ?object where {?child <w:likes> ?object.}")
sparql.rdf(D, "select ?child ?object where {?child <w:hates> ?object.}")
You thus need to used the <> in the SPARQL calls but not calls to add.triple(). This seems obvious now but confused a few of us at the time.
i think you're asking about "blank" prefixes... if so:
when you define your prefixes, you can just say something like:
PREFIX : <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
which would then be used like:
?sub :sonOf ?obj
How do I find/use op:except with the multiple xml files?
I've gotten the nodes from file 1 and file 2, and in the xquery expression I'm tring to find the op:except of those two. When I use op:except, I end up getting an empty set.
XML File 1:
<a>txt</a>
<a>txt2</a>
<a>txt3</a>
XML File 2:
<a>txt2</a>
<a>txt4</a>
<a>txt3</a>
I want output from op:($nodesfromfile1, $nodesfromfile2) to be:
<a>txt</a>
It effectively comes down to the single line behind the return in the following code. You could put that in a function if you like, but it is already very dense, so maybe not worth it..
let $file1 := (
<a>txt</a>,
<a>txt2</a>,
<a>txt3</a>
)
let $file2 := (
<a>txt2</a>,
<a>txt4</a>,
<a>txt3</a>
)
return
$file1[not(. = $file2)]
Note, you also have the 'except' keyword ($file1 except $file2), but that works on node identity which won't work if the nodes comes from different files.
By the way, above code uses string-equality for comparison. If you would prefer to do a comparison on full node-structure, you could also use the deep-equal() function.
HTH!