from iro.model import schema

from sqlalchemy.orm import class_mapper

tables = []

for attr in schema.__tables__:

    if attr[0] == '_': continue

    try:

        cls = getattr(schema, attr)

        tables.append(class_mapper(cls))

    except:

        pass

#schema plot

def createSchemaPlot(fname):

    from sqlalchemy_schemadisplay3 import create_schema_graph

    graph = create_schema_graph(metadata=schema.Base.metadata,

        show_datatypes=True, # The image too large if datatypes shown

        show_indexes=True, # ditto for indexes

        rankdir='LR', # From left to right (instead of top to bottom)

        concentrate=True, # Don't try to join the relation lines together

    )

    graph.set_size('6.5,10')

    #graph.set_ratio("fill")

    graph.write_svg(fname)

#umlplot

def createUMLPlot(fname):

    from sqlalchemy_schemadisplay3 import create_uml_graph

    from sqlalchemy.orm import class_mapper

    mappers = []

    for attr in dir(schema.model):

        if attr[0] == '_': continue

        try:

            cls = getattr(schema.model, attr)

            mappers.append(class_mapper(cls))

        except:

            pass

    #pass them to the function and set some formatting options

    graph = create_uml_graph(mappers,

        show_operations=False, # not necessary in this case

        show_multiplicity_one=True, # some people like to see the ones

        show_attributes=True,

    )

    graph.set_size('6,5')

    graph.set_ratio("fill")

    graph.write_png('test.png')