Intermarket analysis on commodities,bonds,USD

The relationship between the bond prices Vs commodities Vs USD is messing with my head.

alright we all agree that bond prices move opposite to usdx AND commodities And a weak dollar means stronger commodities

BUT If bonds are bullish that means the bond yields are going down therefore usdx is declining

So why do bond prices and commodity prices move opposite to eachother??? Doesn't a weak dollar mean stronger bond prices and commodities