当from gekko import GEKKO
import numpy as np
import matplotlib.pyplot as plt
m = GEKKO()
m.time = np.linspace(0,20,41)
p = m.MV(value=0, lb=0, ub=100) # Declare MV
p.STATUS = 1 # allow optimizer to change
p.DCOST = 0.1 # smooth MV response
p.DMAX = 10.0 # max move constraint
v = m.Var(value=0)
sp = np.ones(41)*40
sp[20:] = 60
s = m.Param(value=sp)
e = m.CV(value=0) # Declare CV
e.STATUS = 1 # add CV to the objective
m.options.CV_TYPE = 2 # squared error
e.SP = 0 # set point
e.TR_INIT = 1 # error trajectory
e.TAU = 5 # time constant of trajectory
m.Equation(e==s-v)
m.Equation(10*v.dt() == -v + 2*p)
m.options.IMODE = 6 # control
m.solve(disp=False)
plt.figure()
plt.subplot(2,1,1)
plt.plot(m.time,p.value,'b-',label='MV Optimized')
plt.legend()
plt.ylabel('Input')
plt.subplot(2,1,2)
plt.plot(m.time,sp,'k-',label='Setpoint')
plt.plot(m.time,v.value,'r--',label='CV Response')
plt.ylabel('Output')
plt.xlabel('Time')
plt.legend(loc='best')
plt.show()
具有特定值时，我想为文档分配一个新值。我可以执行previousValue，但触发器将再次触发并被循环。
我想在文档更改时创建业务规则，并用新值更新该文档对象，但是我不想再次调用firestore('collection').doc('id').update(newValue)函数。
onUpdate() 是否可以通过在触发export const onScheduleUpdated = functions.firestore
.document('units/{unitId}/schedules/{scheduleId}')
.onUpdate(async (change, context) => {
const previousValue = change.before.data();
const newValue = change.after.data();
if (!newValue) { return; }
if (previousValue && previousValue.status === 'inAttendance'
&& newValue.status === 'answered') {
const hour = moment();
const hourSchedule = moment(newValue.endHour);
if (hour.diff(hourSchedule, 'minutes') <= 59) {
newValue.endHour = moment().toDate();
}
/**
* If I do it will be in a correct loop? I would like to create business rules within
* this function to change the value of the document without triggering the trigger again.
*/
await firestore.collection('units').doc(context.params.unitId)
.collection('schedules').doc(context.params.scheduleId).update(newValue);
}
});
函数时将新值分配给文档属性来更新文档，而无需再次触发该触发器？