Page Comparison

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* REMEMBER: This is a hash code of an object that was calculated and saved on the last pull of this object from Parent. This hash code is stored in a separate table than pulled object.

** See See Merge

PUSH:

• RULE 2
  
  If hash code of an object on Parent instance is NOT equal to hash code of an object on Child instance* it means that the object was updated on Parent instance after the last pull to Child (we are pushing modifications of outdated version of object) → 
  
  
  • if object on Child instance was NOT modified (calculated hash code of modified object is equal to hash code saved on Child's instance*) → PUSH operation of this object will not take place
    
    
  • if object on Child instance was modified (calculated hash code of modified object is NOT equal to hash code saved on Child's instance*) → 
    
    • these two objects have to be merged**, then
    • saved on Child and Parent instance;
    • hashcodeshash codes on both Child and Parent instance have to be updated.

* REMEMBER: This is a hashcodehash code of an object that was calculated and saved on the last pull of this object from Parent. This hash code is stored in a separate table than pulled object.

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