javascript - Knex migration seeding completes with error -

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i'm seeding db array looks this, words , definitions in many many relationship

var seeds = [ {     "word": "click",     "definitions": ["computer", "mouse", "tasto", "pulsante", "selezionare"] }, {     "word": "galoppo",     "definitions": ["cavallo", "andatura", "trotto", "ippica", "passo"] }, {     "word": "raggio",     "definitions": ["sole", "bicicletta", "diametro", "luce", "laser"] }, { . . .goes on 1089 objects

this tried

exports.seed = function (knex, promise) { var promises = seeds.map(function (seed) {     return knex('words').insert({         word: seed.word     }, 'id').then(function (word_id) {         var promises = seed.definitions.map(function (definition) {             return knex('definitions').insert({                 definition: definition             }, 'id').catch(function (err) {                 if (err.code === 1062)                     return knex('definitions').select('id').where({                         definition: definition                     }).then(function (duplicate) {                         return knex('definitions_words').insert({                             definition_id: duplicate[0].id,                             word_id: word_id                         });                     });             }).then(function (definition_id) {                 return knex('definitions_words').insert({                     definition_id: definition_id,                     word_id: word_id                 });             });         });         return promise.all(promises);     }); }); return promise.all(promises); };

words unique in seeds definitions may repeat, catch duplication error , grab id of duplicate put in junction table. seems work fine, junction table in fact ends 1089*5 rows (5445), error on cli:

error: cannot add or update child row: foreign key constraint fails (`mytable`.`definitions_words`, constraint `definitions_words_definition_id_foreign` foreign key (`definition_id`) references `definitions` (`id`))


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