Using objects in an object model as database entities

A computing device, comprising:

• one or more processors;
• memory;
• a display;
• and
• one or more programs stored in the memory and configured for execution by the one or more processors, the one or more programs comprising instructions for:
• loading a schema region of a data visualization user interface with information about a plurality of data objects, each of the data objects visually associated with its respective data fields;
• receiving user input to specify a mathematical expression that includes a first data field from a first object of the plurality of data objects and a second data field from a second object of the plurality of data objects, wherein:
• the second data field is distinct from the first data field;
• and
• the first object and the second object are distinct objects of an object model comprising a tree in which each relation between objects represents a respective many-to-one relationship between respective objects;
• generating a calculated data field based on the mathematical expression;
• assigning the calculated data field as a member of a third object in the object model of the plurality of data objects according to relations in the tree connecting the first object to the second object;
• displaying the calculated data field, in the schema region, visually associated with the third data object;
• receiving user selection of the calculated data field from the schema region and placement of the calculated data field into a shelf region;
• and
• generating and displaying a data visualization according to calculated data values for the calculated data field.

A non-transitory computer readable storage medium storing one or more programs configured for execution by a computing device having one or more processors, memory, and a display, the one or more programs comprising instructions for:

• loading a schema region of a data visualization user interface with information about a plurality of data objects, each of the data objects visually associated with its respective data fields;
• receiving user input to specify a mathematical expression that includes a first data field from a first object of the plurality of data objects and a second data field from a second object of the plurality of data objects, wherein:
• the second data field is distinct from the first data field;
• and
• the first object and the second object are distinct objects of an object model comprising a tree in which each relation between objects represents a respective many-to-one relationship between respective objects;
• generating a calculated data field based on the mathematical expression;
• assigning the calculated data field as a member of a third object of the plurality of data objects in the object model according to relations in the tree connecting the first object to the second object;
• displaying the calculated data field, in the schema region, visually associated with the third data object;
• receiving user selection of the calculated data field from the schema region and placement of the calculated data field into a shelf region;
• and
• generating and displaying a data visualization according to calculated data values for the calculated data field.