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 models = Self.app.models;
        const myOptions = {};

        if (ctx.options && ctx.options.transaction)
            myOptions.transaction = ctx.options.transaction;

        const claimBeginning = await Self.findById(ctx.where.id);

        const filter = {
            where: {id: claimBeginning.claimFk},
            include: [
                {
                    relation: 'claimState',
                    scope: {
                        fields: ['id', 'code', 'description']
                    }
                }
            ]
        };

        const [claim] = await models.Claim.find(filter, myOptions);
        const isEditable = await models.ClaimState.isEditable(httpCtx, claim.claimState().id);

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