implenment loading data from MongoDB.

DataContainer/MongoDB.py

@@ -2,12 +2,16 @@ from collections import OrderedDict
 
 import numpy as np
 import pymongo
+from pymongo import MongoClient
 import xarray_mongodb
 import bson
 import builtins
 
 import xarray as xr
-
+# import sys
+# #sys.path.insert(0, 'C:/Users/Fabrizio Klassen/PycharmProjects/DyLabDataViewer/src/bin/Analyser/AnalyserScript')
+# import sys
+# sys.path.append('../')
 from ToolFunction.ToolFunction import get_date
 
 
@@ -292,7 +296,7 @@ class MongoDB:
 
             filter.update(global_parameters)
 
-            mongoID, _ = self.xdb.put(dataSet)
+            mongoID, _ = self.xdb.put(stackedDataSet_single)
 
             data_label = {
                 name:
@@ -427,7 +431,6 @@ class MongoDB:
 
         docs = self.mongoDB['global'].find(filter).sort('runNum')
         docs = [doc['global_parameters'] for doc in docs]
-        
         for doc in docs:
 
             global_parameters = doc
@@ -553,6 +556,112 @@ class MongoDB:
 
         return res
 
-    def load_data(self, shotNum=None, globalDict=None, date=None, field=None):
+    def load_data(self, shotNum, data_key=None, globalDict=None, date=None):
-        # load all the data of specified shot
+        """load observables of given shot"""
-        pass
+        """the documents of a given shot can carry a variety of data types, i.e. optical density,
+        N_count, centerx etc. In order to not load all the data and take too much RAM, the user
+        is presented with a drop down featuring all possible observables. Only after selection the 
+        actual data is being loaded
+
+        :param shotNum: The shot number, defaults to None
+        :type shotNum: str, optional
+        :param date: The date of the data ('YYYY/MM/DD'), defaults to None
+        :type date: str, optional
+        :return: All data types in the given shot
+        :rtype: list
+        """
+        # set date
+        if not date is None:
+            self.set_date(date)
+
+        # collect global parameters and scan axes
+        if globalDict is None:
+            globalDict = self.read_global_all(shotNum=shotNum, date=date)
+
+        # initialize output dictionary
+        res = {'year': self.year, 'month': self.month, 'day': self.day, 'global_parameters': {}}
+
+        # add all global parameters except scan axes
+        res['global_parameters'].update(
+            {
+                key: value
+                for key, value in globalDict.items()
+                if key not in ['scanAxis', 'scanAxisLength']
+            }
+        )
+
+        # find data
+        filter = {
+            'year': self.year,
+            'month': self.month,
+            'day': self.day,
+            'shotNum': shotNum,
+        }
+
+        docs = self.mongoDB['global'].find(filter).sort('runNum')
+        
+        if data_key is None:
+            data_key = [key for key in docs[0] if not key in ['year', 'month', 'day', 'shotNum', 'runNum', 'global_parameters', '_id']]
+        
+        for key in data_key:
+            res[key] = self._load_data(shotNum=shotNum, data_key=key, globalDict=globalDict)
+        
+        res['global_parameters'].update(
+            {
+                'scanAxis': globalDict['scanAxis'],
+                'scanAxisLength': globalDict['scanAxisLength'],
+            }
+        )
+        
+        return res
+    
+    def _load_data(self, shotNum, data_key, globalDict):
+        """load all the data of specified shot"""
+        """go through the given global document and find all the MongoDB object, then replace them with the document they linked to.
+
+        :param shotNum: The shot number, defaults to None
+        :type shotNum: str, optional
+        :param globalDict: All global parameters plus scan axes and scan axes length, defaults to None
+        :type globalDict: dict, optional
+        :param date: The date of the data ('YYYY/MM/DD'), defaults to None
+        :type date: str, optional
+        :return: Data from all runs of given shot including global parameters and date
+        :rtype: dict
+        """
+
+        # collect data from all docs of given shot
+        filter = {
+            'year': self.year,
+            'month': self.month,
+            'day': self.day,
+            'shotNum': shotNum,
+        }
+
+        # find matching docs
+        docs = self.mongoDB['global'].find(filter).sort('runNum')
+
+        data = []
+        for doc in docs:
+            key=data_key
+            if isinstance(doc[key], dict) and ('mongoID' in doc[key]):
+                mongoID = doc[key]['mongoID']
+                engine = doc[key]['engine']
+                single_data = self._load_data_single(mongoID=mongoID, engine=engine)
+                print(single_data)
+                for axis in globalDict['scanAxis']:
+                    if not axis in single_data.dims:
+                        single_data = single_data.expand_dims(axis)
+            else:
+                engine = None
+                single_data = doc[key]
+                        
+            data.append(single_data)
+
+        # combine data along coordinate axes
+        try:
+            if engine =='xarray':
+                data = xr.combine_by_coords(data)
+        except:
+            pass
+
+        return data