The XQuery IDE
New in 2.0.8
When developing an XQuery application, enable Live Reload and the browser tab or window containing the application's web page will automatically reload whenever you save a resource belonging to the app's package.
Just start the app via the
Application/Run app menu entry and check
activate live reload.
Note: due to browser security restrictions, live reload will only work if the app window has been opened from within eXide, not via the dashboard. A web page cannot control other windows unless it created them.
Drag and drop files into the editor
Drag a file on the editor to open its contents in a new tab.
Preserves directory structure
A long requested feature is now available - at least if you are on Chrome: you can now upload entire directories and preserve their structure. Even better: drag and drop of directories works as well.
XQuery Editor Features
Validation as you type
eXide constantly validates code while you edit an XQuery. It combines a client-side XQuery parser (xqlint) with the errors reported by the eXist-db server.
Validation on the server finds errors across all related modules, while the client-side parsing provides the syntax tree required for sophisticated refactoring, context-sensitive code completion etc.
Context-sensitive code completion
In XQuery mode, pressing the
tab key after typing a few characters calls context-sensitive code completion.
The suggestions shown depend on the context:
- if the character sequence starts with a $, search for possible variable expansions
- if it matches a code snippet, insert it
- all other cases: show functions matching the entered prefix
A popup will be shown if there's more than one possible completion. Otherwise the code is just inserted.
As an alternative to the
tab key, you can also press
Option-Space (Mac). Unlike
tab, this will also work if the cursor is placed in white space
or inside the prefix or namespace declarations of an import module or declare namespace expression.
Code templates to save you some typing
Snippets are triggered by pressing
tab after typing a known keyword. For example, to create a new XQuery function, type
fun and press
tab. A snippet may have one or more parameters to change: after insertion,
the function name will be selected so you can edit it. Pressing
tab will move to the next snippet parameter.
ESC when you are done editing parameters.
XQuery mode, press
Cmd-Space after a whitespace.
The snippet definitions use the same syntax as the textmate editor (a well-known editor on the mac). Feel free to edit them. All snippet files reside in the templates collection inside the eXide collection.
Extract function or variable from selected block
When writing XQuery code, one often ends up with long FLWOR expressions or markup with lots of enclosed XQuery. In good functional style you want to clean this up and extract code into functions. eXide 2.0 simplifies this by providing refactorings for functions and variables.
To extract code into a function, select it in the editor (the block has to be syntactically valid) and choose
Cmd-Ctrl-X (Mac). A new function will be created with all dependant variables transformed into parameters.
At the same time the code block is replace with a matching function call and your cursor is duplicated and placed
at the function names, so you can just start typing and edit both. Press
ESC once you are done.
Extracting a variable works in a similar way. Just press
after selecting a valid code block.
Rename a variable, function or XML element without breaking code
To rename a variable or function, just place the cursor inside a variable or function name, either in its declaration
or any reference to it. Press
Cmd-Ctrl-R. eXide finds all occurrences of the variable or function in the current scope (other variables with
the same name are not affected) and creates a new cursor for each of them. Start changing the name and you'll see how all
other occurrences change as well!
To rename an XML element, place the cursor inside the tag name of the start or end tag. This also works in XML and HTML mode!
ESC when you are done.
for some frequent issues
eXide continually parses the XQuery code while you type and displays an error or warning icon in the gutter of
the corresponding line. But instead of just complaining, eXide is able to suggest a quick fix for some types
of warnings or errors. To see if a quick fix is available, click on the icon or press the quick fix shortcut
Command-Ctrl-Q) to see a list of suggestions. Quick fixes are available for
(we'll add more over time):
- undeclared namespaces
- calls to unknown functions
- unknown variables
- unused namespaces or module imports
Quickly navigate XQuery code
In XQuery mode, eXide knows all reachable functions either in the current module or any imported one.
To navigate to a function declaration, place the cursor inside the function name of a call and press
To quickly navigate to any known function or variable declaration, press
Cmd-Shift-U and choose a target from the popup. Btw, within the popup, just type to
limit the displayed list to items containing the typed string.
Importing modules into an XQuery
There are two ways to quickly import another XQuery module into the current code:
- Choose the "Import Module" dialog from the menu or type
- Create an "import module" statement (type "import" and press
tab) and enter the prefix. When you are within the quotes for the namespace URI, press
Cmd-Spaceto call autocomplete. This should pop up any module currently stored in the db which matches the prefix you entered.
Keeping eXide installed on a production server can pose a security risk. eXide fully respects eXist's security model, so users will only see resources they have the appropriate permissions on. However, if a query is exposed to the web, it needs to be publicly readable, so users will be able to see at least parts of the application code via eXide.
eXide thus provides additional security checks, so one can hide any valuable source code while still allowing some users to access specific parts of the db via eXide. Security settings are read from the configuration.xml file within the eXide app collection:
<configuration> <restrictions execute-query="yes" guest="no"> <!-- disallow access to certain collections --> <!--deny collection="/db/apps/dashboard"/--> </restrictions> </configuration>
- The execute-query=yes|no attribute controls if non-dba users are allowed to execute XQuery code from within eXide.
- guest=yes|no: if set to "no", the default guest user will not be able to log in. eXide will thus always show a login window before the editor is loaded - unless you already provided credentials during a previous, still valid session.
- One or more <deny> elements can be specified to block access to particular collections, even if the user has the appropriate database permissions to see those collections.
The additional security checks are done on the server, so hacking the client won't be fruitful. However, if you use the <deny> feature, you must make sure that access to eXide's own collection is denied as well. If not, logged in users could simply change eXide's code.