validate parent in course hierarchy

ShaneBurkhart / SparkSchool

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Closed ryan-endacott closed 10 years ago

ryan-endacott commented 10 years ago

same with unit

ryan-endacott commented 10 years ago

hierarchy is course > unit > lessons

ryan-endacott commented 10 years ago

Done as of - 4b375086adf6664de40b6edfc4455ad26260f2a2