In this paper, we exactly solve the (2 + 1)-dimensional Dirac equation in a constant
magnetic field in the presence of a minimal length. Using a proper ansatz for the wave
function, we transform the Dirac Hamiltonian into two two-dimensional nonrelativistic
harmonic oscillator and obtain the solutions without directly solving the corresponding
differential equations which are presented by Menculini et al. [Phys. Rev. D 87 (2013)
065017]. We also show that Menculini et al. solution is a subset of the general solution
which is related to the even quantum numbers.
