34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
const cds = require('@sap/cds')
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const $super = { validate: cds.validate, skip(){} }
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/**
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* Quick and dirty implementation for cds.validate() using db-level constraints.
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*/
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cds.validate = function (x, pk, ...columns) {
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// Delegate to base impl of cds.validate() for standard input validation
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if (!_is_constraints(x)) return $super.skip (...arguments)
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// Support subject refs to base entities as arguments
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if (x?.ref) [ x, pk ] = [ x.ref +'.constraints', pk.ID||pk ]
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// Run the constraints check query
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const constraints = cds.model.definitions[x] || cds.error `No such constraints view: ${x}`
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return SELECT.one.from (constraints, pk, columns.length && columns)
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// Collect and throw errors, if any
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.then (checks => {
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const failed = {}; for (let c in checks) {
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if (c in constraints.keys) continue
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if (c[0] == '_') continue
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if (checks[c]) failed[c] = checks[c]
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}
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if (Object.keys(failed).length) throw cds.error `Invalid input: ${failed}`
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})
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}
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// Helpers
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const _is_constraints = x => x.ref || x.is_entity || typeof x === 'string'
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