How to save data from form FileField to DB Django

I have a model and have added a Form FileField to take a file and save all their contents for a particular object. The FileField doesn't need to be in the database hence not added as a model.fileField. The content from the file should be read , parsed and added to the synonym_type. 

**model.py** 

    molecule = models.ForeignKey('MoleculeDictionary', blank=False, null=False)

    synonym_type = models.ForeignKey('SynonymType')

                       

    synonym_name = models.CharField(max_length=50, blank=True)

    def __unicode__(self):

            return u'%s' % (self.synonym_name)

And this is how I add Form field to the models(admin)page. 

**form.py**

 

        from django.forms import ModelForm

        from django.forms import *

        import pdb

        import os

        from django.core.files.uploadedfile import SimpleUploadedFile

        from django.core.files import File

        from idg.models.molecule_synonym import MoleculeSynonym

        

        

        class MoleculeSynonymForm(ModelForm):

            file_upload = FileField(required=False)

            print "YES" 

            def save(self, commit=True):

                print 'saving...'

                file_upload = self.cleaned_data.get('file_upload', None)

                file_upload.seek(0)

                with open("../../Downloads/model_file_upload.txt", 'r') as f:

                    model_file = File(f)

                    names = model_file.read()

                    print(names)

        

                    form = MoleculeSynonymForm(names)

                    

                    return super(MoleculeSynonymForm, self).save(commit=commit)

                #

        

            class Meta:

                model = MoleculeSynonym

I have two questions: 

1. How should I save the names to the Synonym_name for a chosen synonym_type and molecule. I use sqlite. My current code doesn't throw any errors other than: 

> The molecule synonym "" was added successfully.

2. How do I get the "full path for the file" without hardcoding them in the open statement. 

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