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--- public:lta_tricks [2019-09-20 07:25] – Updated link to LOFAR stager API Python module to point to the ASTRON gitlab repo Thomas Jürges
+++ public:lta_tricks [2020-04-10 10:03] – [Examples] Reinoud Bokhorst
@@ Line 140: / Line 140: @@
 In case of errors, there may be the need to open some port on the firewall at your institution. Specifically, port 1521 should be open. Also make sure that the LTA client library can be found in your PYTHONPATH (see [[:lta:client_installation|LTA Client installation]] for more details). In case of trouble, get in contact with Science Operations and Support.
-== Examples ==
+==== Examples ====
 Once you have tested that your connection to the catalogue is working, you are ready to browse the archive and stage the data you need. Here we will list a few examples of python scripts that can be used to access the LTA. All of them will need to import some modules:
@@ Line 302: / Line 302: @@
 </code>
-== Example; query public data ==
+=== Example; query public data ===
 Querying public data in projects you are not member of. First set project ALL, then construct a query and optionally limit the query to a certain project :
@@ Line 314: / Line 314: @@
 </code>
+=== Example; get release date for all observations, pipelines and data products in a project ===
+<code python>
+from awlofar.main.aweimports import Observation, PipelineRun, DataProduct
+from common.database.Context import context
+project = 'LC2_035'
+# Query for private data of the project, you must be member of the project
+private_data = True
+# To see private data of this project, you must be member of this project
+if private_data :
+    context.set_project(project)
+    if project != context.get_current_project().name:
+        raise Exception("You are not member of project %s" % project)
+# Observations
+query_observations = Observation.select_all().project_only(project)
+for observation in query_observations :
+    print("Querying ObservationID %s, %s" % (observation.observationId, observation.releaseDate))
+# Pipelines
+query_pipelines = PipelineRun.select_all().project_only(project)
+for pipeline in query_pipelines :
+    print("Pipeline: %s, %s, %s" % (type(pipeline).__name__, pipeline.pipelineName, pipeline.releaseDate))
+# Data products
+query_products = DataProduct.select_all().project_only(project)
+query_products &= DataProduct.isValid == 1
+for product in query_products :
+    print("Product: %s, %s, %s, %s" % (product.dataProductIdentifier, product.dataProductIdentifierSource, product.dataProductType, product.releaseDate))
+</code>
 ===== Python Module for Staging =====