Add Collection Time attribute to Sample

[jcmatese]

FEATURE DESCRIPTION

Feature Inspiration

Currently, the only time in the Animal-Sample models is age, which was mentioned by Michael to be in units of "weeks" However, there is no "time post infusion" metric directly associated with the sample [probably measured in minutes]. This is also needed for the calculation of some of the Fcirc values in #43.

Feature Description

Add a field to the Sample model, for concept of "time post infusion" metric in minutes (or "sampling_time"). To be discussed...

~Add help_text for columns that might benefit~ superseded by #44

Make animal and tissue nullable for sample

Alternatives Considered

none

Comment

reference: "specific timing of tissue collection (tissues may be collected after anywhere from 1 minute to over 24 hours of infusion)."

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ISSUE OWNER SECTION

Assumptions

• List of assumptions made WRT the code
• E.g. We will assume input is correct (explaining why there is no validation)

Requirements

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• E.g. Every column/row must display a value, i.e. cannot be empty

Limitations

• A list of things this work will specifically not do
• E.g. This feature will only handle the most frequent use case X

Affected/Changed Components

• Files
• Environment variables
• External executables
• Database tables
• Cron job settings
• Etc.

DESIGN

GUI Change description

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Code Change Description (Pseudocode optional)

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Tests

A test should be planned for each requirement (above), where possible.

[hepcat72]

Do you intend to take this issue @jcmatese?

[jcmatese]

Not on my calendar. Take it if you want (I did not really precisely specify it, though)