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41 lines
1.6 KiB
41 lines
1.6 KiB
// Copyright 2020 beego
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package orm
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import (
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"context"
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)
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// FilterChain is used to build a Filter
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// don't forget to call next(...) inside your Filter
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type FilterChain func(next Filter) Filter
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// Filter's behavior is a little big strange.
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// it's only be called when users call methods of Ormer
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// return value is an array. it's a little bit hard to understand,
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// for example, the Ormer's Read method only return error
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// so the filter processing this method should return an array whose first element is error
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// and, Ormer's ReadOrCreateWithCtx return three values, so the Filter's result should contains three values
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type Filter func(ctx context.Context, inv *Invocation) []interface{}
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var globalFilterChains = make([]FilterChain, 0, 4)
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// AddGlobalFilterChain adds a new FilterChain
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// All orm instances built after this invocation will use this filterChain,
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// but instances built before this invocation will not be affected
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func AddGlobalFilterChain(filterChain ...FilterChain) {
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globalFilterChains = append(globalFilterChains, filterChain...)
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}
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