An action to enforce a mechanic’s lien shall be by equitable proceedings, and no other cause of action shall be joined therewith.

Any lien statement may be amended by leave of court in furtherance of justice, except as to the amount demanded.

[C51, §985; R60, §4183; C73, §2510; C97, §3429; C24, 27, 31, 35, 39, §10295; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §572.26]