namespace declaring clause causing compiling error (Qt XQuery)

Question

I'm using the QXmlQuery class in Qt to do XQuery on a soap response. As the response contains two namespaces, I use the declare clauses (the second and the third lines in the code snippet below) to declare them first before using them in the Xpath expression.

QXmlQuery query;

declare namespace s = "http://www.w3.org/2003/05/soap-envelope";

declare namespace ms = "http://schemas.microsoft.com/sharepoint/soap/";

query.setQuery("doc($xmlDoc)/s:Envelope/s:Body/ms:GetListCollectionResponse/ms:GetListCollectionResult/ms:Lists/ms:List/string()");

However, I got the following errors when compiling the code. Does anybody know how to fix this?

src/QtHelloWorldMakeCommImpl.cpp:79: error: 'declare' was not declared in this scope
src/QtHelloWorldMakeCommImpl.cpp:79: error: expected ';' before 'namespace'
src/QtHelloWorldMakeCommImpl.cpp:80: error: expected ';' before 'namespace'

Not sure about QXmlQuery, but it looks like you would try to declare the namespaces outside the query. There must be some function like query.declareNamespace or similar. — Jens Erat
– Jens Erat, Commented Nov 8, 2011 at 22:12

misberner · Accepted Answer · 2011-11-08 22:14:24Z

1

The "declare" statement is an XQuery statement, but you use it directly in the C++ file - this can't work. I have no Qt install here, but the following should work

QString queryStr(
"declare namespace s = \"http://www.w3.org/2003/05/soap-envelope\";\n"
"declare namespace ms = \"http://schemas.microsoft.com/sharepoint/soap/\";\n"
"doc($xmlDoc)/s:Envelope/s:Body/ms:GetListCollectionResponse/ms:GetListCollectionResult/ms:Lists/ms:List/string()");

query.setQuery(queryStr);

answered Nov 8, 2011 at 22:14

misberner

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Community · Accepted Answer · 2017-05-23 10:24:21Z

-1

Have a look at this answer on how to declare namespaces. You try to declare it in C++-Code where declare is no keyword neighter you declarated it.

This should work:

query.setQuery("declare namespace s = \"http://www.w3.org/2003/05/soap-envelope\"; declare namespace ms = \"http://schemas.microsoft.com/sharepoint/soap/\"; doc($xmlDoc)/s:Envelope/s:Body/ms:GetListCollectionResponse/ms:GetListCollectionResult/ms:Lists/ms:List/string()");

edited May 23, 2017 at 10:24

CommunityBot

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answered Nov 8, 2011 at 22:15

Jens Erat

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6 Comments

Michael Kay Over a year ago

I suspect Ranon had the right idea but suffered finger-trouble supplying the code.

Jens Erat Over a year ago

Guess you're totally right. Must have missed the preview. Copy-pasting seems to be quiet difficult.

user1036535 Over a year ago

Thanks, Ranon and Mike! By doing what Ranon suggested, the compiling error went away. query.isValid() returns true. However, query.evaluateTo(&segments) return false (segments is a QStringList instance to hold the query result) and hence I get an empty query result. I double check my query and they should be correct. Any further suggestion on how to debug further. I tried using F5 to step into the evaluateTo() function but didn't succeed. Thanks again!

Jens Erat Over a year ago

Please provide some well-formed XML snippet against which we can run the query. Add small fragments to your question, bigger could be posted on gist for example.

user1036535 Over a year ago

I posted my source code and the xml document to the following link. Would be appreciated if you can take a look. Thanks a lot! gist.github.com/1355120

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