How to Make a bode plot of an inverting amplifier?
If the op amp is unity-gain-stable, you can model it for first-approximation type calculations of small-signal as just an integrator. (i.e. the very-low-frequency behavior will rarely matter). The OP amp open loop gain would be
A_OL = ω_A / jω = (-j ω_A) / ω
where ω_A = (2π)(f_GBW)
Then proceed with the feedback network based on that. There is more to it in reality, but this will go a long way.