When an algorithm returns this flag, and after executing it in a model it doesn't set a
certain output which remaining model algorithms depend on, then these branches are
pruned back and don't get executed for the model run.
Allows for creation of algorithms which impact the overall model flow.
When designing a model, users typically will need to run the model
many times as they tweak its structure.
This change causes the parameters used when running the model from
the designer to be remembered and saved into the model, so that
each time you run the model from the designer you don't have to
re-set all the input parameter values to the desired test ones.
Makes iterative model design SO much easier!
Sponsored by Alta Ehf
This allows users to create comments attached to model components (inputs,
algorithms or outputs). Comments are shown linked to the associated component,
and can be freely moved around the model.
These algorithms raise either a custom warning in the processing log, OR raise
an exception which causes the model execution to terminate.
An optional condition expression can be specified to control whether or not
the warning/exception is raised, allowing logic like "if the output layer from
another algorithm contains more then 10 features, then abort the model execution"
Sponsored by Fisel + König
be shown to users when using that provider
This can be used to return a translated warning message which should be
shown to users of this provider. It's intended for use in cases such as
a provider which relies on a 3rd-party backend, where the version of the
backend software is not officially supported, or for alerting users to
providers in a "beta" or "untrustworthy" state.
always avoid using temporary file names, and then set this option as
enabled by default.
Also change the setting key so that existing users will also get the new
default value.
Fixes#32591
A few releases ago a bug fix was implemented which forced conversions
of multi-layer sources. This was a valid bug fix, but the consequence
was that any algorithm using this api with a source file containing
multiple layers (e.g. gpkg) performed a complete copy of the target
layer to a new file, severely impacting performance.
This commit adds new API to retrieve a compatible layer path in the
case when an algorithm CAN correctly handle specific target layer names.
In this case, the forced copy of the source layer is avoided when
using multi-layer inputs like geopackage.
These methods return a file extension to use when creating vector/raster outputs (e.g. "tif"). Generally,
it is preferable to use the extension associated with a particular parameter, which can be retrieved through
QgsProcessingDestinationParameter::defaultFileExtension(). However, in some cases, a specific parameter
may not be available to call this method on (e.g. for an algorithm which has only an output folder parameter
and which creates multiple output layers in that folder). In this case, the format returned by this
function should be used when creating these outputs.
It is the algorithm's responsibility to check whether the returned format is acceptable for the algorithm,
and to provide an appropriate fallback when the returned format is not usable.
output format
This setting is still used and required in some circumstances, e.g.
it is used as the default selection in outputs file pickers when
the previously used format is not valid.
to have a file filter string defined
Previously only an extension was settable, which prevented use when
multiple extension types are possible. A file filter string allows
for flexible file selection instead.
In processing, if an algorithm has a boolean as an output, it cannot be defined as boolean but as a number.
To be more precise in algorithms description, the commit add QgsProcessingOutputBoolean.
