Why does it throw errors when adding elements to QSet and QList?

Question

Qt

Hello Habr!
How are you doing? How is your health?
Actually the question:
There is a code:

...
QSet<eqRec> eqsOne;
...
for(QList<eqRec>::iterator it = access.getEqs()->begin(); it != access.getEqs()->end(); it++){
   ...
   eqsOne.insert(*it);  // место, откуда переходит на ошибку
   ...
}

The mistake itself

C:\Qt\5.4\mingw491_32\include\QtCore\qhash.h:102: error: no matching function for call to 'qHash(const eqRec&)'
{ return (qHash(t) ^ seed); }

What am I doing wrong?
PS eqRec - class

Answer 1

What is the type of eqRec?
You can see by mistake that the hash function is not defined for it.