showAssignRole row thissysUser = row thisdialogRoleVisible = true roleApigetRolesByUserIdrowidthenres = thisallRoles = resdataallRoles thisuserRoleIds = resdatauserRoleI

The showAssignRole function takes a row parameter and is used to display a dialog for assigning roles to a user.

Here is the breakdown of the function:

1. this.sysUser = row - Set the sysUser property to the value of the row parameter. This is used to keep track of the user for which roles are being assigned.

2. this.dialogRoleVisible = true - Set the dialogRoleVisible property to true to show the dialog for assigning roles.

3. roleApi.getRolesByUserId(row.id).then(res => { ... }) - Call the getRolesByUserId method of the roleApi service, passing in the id of the row object. This method retrieves the roles associated with the user from the server. The then function is used to handle the response from the server.

4. this.allRoles = res.data.allRoles - Set the allRoles property to the roles retrieved from the server.

5. this.userRoleIds = res.data.userRoleIds - Set the userRoleIds property to the role IDs associated with the user retrieved from the server.

6. this.checkAll = this.userRoleIds.length === this.allRoles.length - Set the checkAll property to true if the number of role IDs associated with the user is equal to the total number of roles.

7. this.isIndeterminate = this.userRoleIds.length > 0 && this.userRoleIds.length < this.allRoles.length - Set the isIndeterminate property to true if the number of role IDs associated with the user is greater than 0 but less than the total number of roles.

By calling the showAssignRole function and passing in a row object, the dialog for assigning roles to the user specified by the row object will be displayed, and the necessary data will be retrieved from the server and stored in the component's properties