salix/modules/claim/back/models/claim-beginning.js

const UserError = require('vn-loopback/util/user-error');
const LoopBackContext = require('loopback-context');

module.exports = Self => {
    require('../methods/claim-beginning/importToNewRefundTicket')(Self);

    Self.validatesUniquenessOf('saleFk', {
        message: `A claim with that sale already exists`
    });

    Self.observe('before save', async ctx => {
        if (ctx.isNewInstance) return;
        await claimIsEditable(ctx);
    });

    Self.observe('before delete', async ctx => {
        if (ctx.isNewInstance) return;
        await claimIsEditable(ctx);
    });

    async function claimIsEditable(ctx) {
        const loopBackContext = LoopBackContext.getCurrentContext();
        const httpCtx = {req: loopBackContext.active};
        const isEditable = await Self.app.models.Claim.isEditable(httpCtx, ctx.where.id);

        if (!isEditable)
            throw new UserError(`The current claim can't be modified`);
    }
};