63 lines
1.2 KiB
JavaScript
63 lines
1.2 KiB
JavaScript
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var Operation = require('./operation');
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var Value = require('./value');
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var Field = require('./field');
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/**
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* Objects to be used as an operands of @Sql.Filter. It represents a two
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* expressions basic operation composed by a table column, the operator and the
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* value extracted from the rendering paramerers.
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*/
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module.exports = new Class({
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Extends: Operation
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,Tag: 'sql-filter-item'
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,Properties: {
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/**
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* The column name.
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*/
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field: {
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type: String,
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value: null
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},
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/**
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* The source table name or its alias if it has been specified.
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*/
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target: {
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type: String,
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value: null
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},
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/**
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* The parameter name.
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*/
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param: {
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type: String,
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value: null
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}
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}
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/**
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* Checks if parameter name has been defined and if it has a value.
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*/
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,isReady(params) {
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return this.param != null && params != null && params[this.param] != null;
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}
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,render(params) {
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var newOp = new Operation({type: this.type});
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newOp.push(new Field({
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name: this.field,
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target: this.target
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}));
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var value = params[this.param];
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newOp.push(new Value({value: value}));
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return newOp.render(params);
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}
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,findHolders() {
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return this.param ? [this.param] : null;
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}
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});
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